In Z-pinch experiments a strongly radiating plasma may adversely effect the transport of power delivered to it. Plasma generated x-rays cause ablation of the diode walls and, if the walls do not become good conductors or if the current (I) carried in the electrode surfaces is too small, loss of insulation in the diode can result. Last year we interpreted experimental results at Maxwell Laboratories as evidence for hydrodynamic closure and proposed a theory to explain the reported behavior....
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *DIODES, *MAGNETOHYDRODYNAMICS, INSULATION,...
Three tracer-gas pressurization studies were conducted in the Dining Car chimney. The objectives of these tests were to evaluate gas flow within the chimney and to measure the flow from the chimney through the surrounding material to the mesa or tunnel complex. The effective permeability and accessible void volume of the chimney and surrounding media was also determined from this data. This report describes the test procedures, test results, data analysis techniques and the distribution of...
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CHIMNEYS, *GAS FLOW, PERMEABILITY,...
A UNIVAC 1108 FORTRAN IV computer program has been written to determine the distribution of energy deposition within a LASER assembly. The code is currently running but needs further enhancement of its input and output facilities as well as a source description. The program uses ray tracing and Monte Carlo methods to obtain a solution. The geometrical and property input to the code is very simple and convenient to write, but the source input still needs to be defined.
Topics: DTIC Archive, Troost, Marius, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *LASERS, DEPOSITION,...
The report discusses the reorganization and reading of a 3-D, linear, steady-state computer code based on the Bretherton formulation. A discussion of the numerical method is included and results of a study of the Sierra Nevada- Owen's Valley region in north-central California is presented. Modification of the Bousinesq hydro-code STUFF used in atmospheric research of turbulence is also presented.
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CLIMATE, ATMOSPHERE MODELS, ATMOSPHERIC...
The capability to predict and understand discriminatory features of teleseismic ground motion from earthquakes and nuclear explosions is close at hand. The central question may be stated as follows: Is it possible to develop an earthquake model, whose parameters may be obtained from laboratory tests on rock samples, that is capable of specifying the earthquake's equivalent elastic source. Our results to date indicate that the answer to this question should be affirmative. The approach we have...
Topics: DTIC Archive, Cherry, J Theodore, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *COMPUTERIZED...
Predictive models for calculating stress wave effects in a geologic medium are developed from the viewpoint that the medium is a composite consisting of the rock matrix and pores that may be only partially filled with water. A representative Nevada Test Site tuff (NTS tuff) is selected in order tor the geologic composite from the equations of state previously developed for its constituents, water and poreless NTS tuff, in an earlier phase of this work. The Theory of Interacting Continua (TINC)...
Topics: DTIC Archive, Roney, T David, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ROCK, *SHOCK WAVES,...
Finite element (FE) and finite difference (FD) spatial differencing schemes for linearly elastic materials are compared on a common basis. Conditions are established under which the two methods are identical. Features commonly associated with FD methods are combined with a FE spatial treatment to obtain an explicit time stepping algorithm suitable for processing 3-D linearly elastic wave calculations on the ILLIAC IV system. Test calculations are presented to compare FE and FD codes at S3....
Topics: DTIC Archive, Frazier, Gerald A, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SEISMIC WAVES,...
Seismological observations of the underground explosions MIGHTY EPIC and DIABLO HAWK were used to infer the extent of the block motions associated with these events. The data were three-component velocity recordings from the nine station seismic network operated by Lawrence Livermore Laboratory (LLL) and Sandia Laboratories at ranges from 131 to 368 km. Five additional stations were fielded by Systems, Science and Software (S3) for DIABLO HAWK. The two events were first compared by...
Topics: DTIC Archive, Bache,T C, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSION TESTING,...
The objective in this contract period has been to parameterize the drag induced by the mountain lee waves by characterizing the atmospheric response function in terms of the atmospheric variables provided by the Rand Global Circulation Model. During the past six months of the contract period considerable progress was made toward parameterization of the lee wave drag for incorporation into the Mintz-Arakawa Global Circulation Model. The limitations imposed by the two-level model are described in...
Topics: DTIC Archive, Jerskey, T N, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ATMOSPHERIC MOTION,...
A stick-slip rupture model has been incorporated into a two- dimensional (plane strain) Lagrangian code with the added feature that rupture initiation is plastic work dependent. Realistic laboratory test data have been used as input to the model. Theoretical seismograms have been generated in both the frequency and time domain along with a decomposition of the ground motion into P and S components. The calculations suggest how estimates of fault length, rupture velocity and dynamic stress drop...
Topics: DTIC Archive, Cherry, J Theodore, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *EARTHQUAKES,...
The contract has been continued to provide an improved version of the ZAP code. The following items have been added to the code: multi-frequency calculation, bodies of revolution, cylindrical surface source, and geometry debug facility. The addition of a helix geometry has been partially completed.
Topics: DTIC Archive, Troost, Marius, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *LASERS, BODIES OF...
The feasibility of an all-secondary explosive, low-voltage, electric detonator was demonstrated. The detonator consists essentially of a donor explosive combustion chamber, an impactor disc, an air-gap and an acceptor explosive column which provides for proper coupling of the following three critical processes: hot-wire initiation of a self-sustaining deflagration in a 'donor' secondary explosive, release and acceleration of a metal impactor disc by confined product gases of the deflagration in...
Topics: DTIC Archive, Lemley, Virgil F, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ELECTRIC DETONATORS,...
The report examines the sensitivity of material response calculations to the choice of equation of state model. Three equation of state models, all of which are available as subroutines in the RIP code, are considered: (1) modified PUFF; (2) RIP mixed phase; and (3) GRAY. Each of these models is used to calculate the one-dimensional response of aluminum, beryllium and titanium; this series of calculations is performed for two distinct x-ray sources. The sensitivity of the calculated material...
Topics: DTIC Archive, Wray, William O, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ALUMINUM, *BERYLLIUM,...
The present study was undertaken in an effort to improve numerical models for meso-scale and small-scale effects which influence global weather and its modification. Two major areas are being studied: the effects of mountain ranges on energy and momentum transfer, and the transient interactions of solar radiation with the earth's atmosphere. It is hoped that the results of these studies will lead to calculationally inexpensive prescriptions which can be incorporated into meso-scale and...
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CLIMATOLOGY, ATMOSPHERIC MOTION, BOUNDARY...
Volume 2 contains a complete FORTRAN IV listing of the HELP program, the background description of which is contained in the preceding Volume 1 (AD0726459).
Topics: DTIC Archive, Hageman, L J, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *COMPUTER PROGRAMS,...
Two tracer-gas pressurization studies were conducted in The Ming Blade chimney. The objectives of these tests were to evaluate gas flow within the chimney and to measure the flow from the chimney through the surrounding material to the mesa. The relative gas permeability and accessible gas-filled void volume of the chimney material was estimated from this data. This report describes the test procedures, test results, and chimney material properties as inferred from the test data. (Author)
Topics: DTIC Archive, Peterson, E, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS,...
All reasonable mechanisms for producing low-velocity zones in the upper mantle should also produce zones of low omega. The available studies of upper mantle omega and velocity for the same regions suggest that a coincidence of low velocity and low omega zones does indeed occur. Seismic body- and surface-wave data indicate a substantial low velocity, low omega zone in the upper mantle beneath western North America. The zone appears to be 150 km thick or more, the velocities for both P and S...
Topics: DTIC Archive, Mitchell, Brian J, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *EARTH MANTLE, *SEISMIC...
DIABLO HAWK was an underground tunnel test to investigate the effects of a nuclear explosion on various structures and systems. Systems, Science and Software fielded an experiment to demonstrate the feasibility of mounting pressure gauges with built-in electronics in a manner to effectively isolate the ground shock and permit continuous output (pressure reading) for a period starting prior to zero time and continuing until power is terminated at the recording trailers. The shock isolation...
Topics: DTIC Archive, Day,E A, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS, *PRESSURE...
The results reported herein are the continuation of numerical studies of meso-scale phenomena related to the effects of orography on momentum and energy transfer in the atmosphere and the interaction of solar radiation with the Earth's atmosphere.
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ATMOSPHERIC MOTION, *CLIMATE, CORIOLIS...
The results reported are part of a continuing study to improve numerical models for meso-scale and small-scale effects which influence global weather and its modification. The two major areas being studied are the effects of mountain ranges on momentum transfer, and the transient interaction of solar radiation with the earth's atmosphere. The results of the research on the solar radiation include several calculations and comparisons with experimental data of heat fluxes in the atmosphere. The...
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ATMOSPHERIC MOTION, *CLIMATE, ATMOSPHERE...
This report describes results of a discrimination experiment performed on a large number of Eurasian events. The objective was to identify each of these events as either an earthquake or an underground explosion based on an analysis of short-period P waves recorded at a global network of seismograph stations. Ten seismograph stations were involved in the experiment. Discrimination results obtained support the theoretical predictions of Archambeau, et al., (1964) and demonstrate that the...
Topics: DTIC Archive, Savino, J M, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SEISMIC WAVES, *SEISMOLOGICAL...
We have constructed a model of the three-dimensional velocity structure in the crust and upper mantle beneath NTS. This model was obtained by inversion of teleseismic travel times from NTS explosions reported for a set of globally distributed seismograph stations. Although the geometry is conceptually the reciprocal of the classical geometry involving a localized network and distributed teleseismic sources, several important differences emerge. In particular, the data are contaminated by...
Topics: DTIC Archive, Minster, J B, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SEISMIC WAVES, ANOMALIES,...
Anomalous surface waves including Love waves and phase reversed Rayleigh waves have been observed from explosions at NTS and from the eastern Kazakh areas of the Soviet Union. In this report we use a linear model for tectonic strain release to estimate the amount and type of prestress required to produce these anomalies. An important use of these results is to guide the input to fully nonlinear simulations of an explosion detonated in a prestressed environment.
Topics: DTIC Archive, Stevens, J. L., SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS,...
A novel finite element scheme has been developed for simulating stress waves using 1-D, 2-D, and 3-D orthogonal curvilinear coordinate systems. Finite deformations and nonlinear material behavior are accommodated using a Lagrangian formulation. In addition, the explicit time stepping scheme is efficient; computing rates of 0.4 and 1.2 m-sec per element per numerical time step have been achieved in 2-D and 3-D test calculations on the ILLIAC IV. About 50 percent slower computing rates were...
Topics: DTIC Archive, Frazier, Gerald A, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *COMPUTER PROGRAMMING,...
This report summarizes efforts to simulate the characteristics of regional seismic phases from earthquakes and explosions. The objective is to use computer generated seismograms to aid our understanding of the origin of regional phases and to examine possible discriminants in regional recordings from earthquakes and explosions. This involves four distinct studies. First, the source-depth dependence of the phase Lg is examined. It is found that the depth dependence of synthetic Lg for...
Topics: DTIC Archive, Swanger, H J, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SEISMIC WAVES, EARTH CRUST,...
Two-dimensional calculations of underground explosions are able to include free surface interaction effects and the depth dependence of overburden pressure and material properties, as well as the complex constitutive models for geologic materials developed in one-dimensional (spherically symmetric) studies. Eleven axisymmetric calculations of explosions in granite are analyzed in this study to determine the two-dimensional effects on the far-field body and surface waves and the magnitude mb and...
Topics: DTIC Archive, Bache, Thomas C, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS,...
This report summarizes work conducted by Systems, Science and Software concerning the generation, propagation, detection and analysis of seismic waves by both nuclear explosions and earthquake sources. Specific topics covered included numerical simulation of the near field ground motion from earthquakes and explosions, automatic signal processing relating to the detection of seismic events and magnitude determination, a compilation of near source data and the synthesis of this data in terms of...
Topics: DTIC Archive, Bache, T C, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SEISMIC SIGNATURES, *SEISMIC...
We describe here a detailed model of the geometrical, material, and electrical properties of the SCATHA satellite for use with the NASA Charging Analyzer Program (NASCAP). Charging calculations in an intense magnetospheric substorm environment demonstrate that: long booms can significantly perturb the potentials near the spacecraft, and discharging by sunlight or by active control can cause serious time-dependent differential charging problems. (Author)
Topics: DTIC Archive, Schnuelle,G W, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SPACE CHARGE, *SCIENTIFIC...
Comparing observed and synthetic seismograms, source amplitudes of NTS explosions are inferred from Rayleigh wave recordings from the WWSSN stations at Albuquerque, New Mexico (ALQ) and Tucson, Arizona (TUC). The potential influence of source complexities, particularly surface spallation and related phenomena, is studied in detail. As described in earlier work by Bache, Rodi and Harkrider, the earth model for the synthetic were converted from observations at ALQ and TUC. The agreement of...
Topics: DTIC Archive, Bache, Thomas C., SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS,...
Volume I details a new numerical model for solving multi-material flows which are functions of two space dimensions and time. The program, called HELP, is basically Eulerian but also contains Lagrangian features for the explicit definition of interface positions. The program is general in the sense that any number of materials can be present in a given Eulerian cell and no special difficulties arise for flows involving extreme material distortions. The program is suitable for compressible media...
Topics: DTIC Archive, Hageman, L J, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *COMPUTER PROGRAMMING,...
Two separate non-linear effects which influence pulsed laser propagation and target interaction have been studied, e.g., laser supported combustion wave (LSC) propagation and laser-induced gas breakdown. A theoretical model describing LSC propagation and which includes the non-linear contributions of the plasma transport and thermodynamic coefficients throughout the wave profile has been developed. The model is one-dimensional and the system of equations is solved by use of the method of...
Topics: DTIC Archive, Boni, A A, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *COMBUSTION, *GAS DISCHARGES,...
Instrumentation has been developed for measuring frictional forces at high velocities between rock samples and the outer rim of a rotating steel wheel. The instrumentation has been used to determine sliding friction values for volcanic tuff, wet and dry sandstone, limestone, grout, bronze and teflon.
Topics: DTIC Archive, Gaffney, E. S., SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ROCK, *STEEL, *KINETIC...
The results reported are part of a continuing study to improve numerical models for meso-scale and small-scale effects which influence global weather and its modification. The two major areas being studied are the effects of mountain ranges on energy and momentum transfer and the transient interaction of solar radiation with the Earth's atmosphere. A new theoretical and numerical scheme for solving the radiative transfer equation in the Earth's atmosphere has been developed. Some improvements...
Topics: DTIC Archive, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ATMOSPHERIC MOTION, *CLIMATE, BOUNDARY...
Two methods have been developed to investigate the sensitivity of numerical solutions of sets of coupled nonlinear differential equations to uncertainties in the modeling parameters entering the calculations of chemical kinetics. The methods determine the sensitivity by performing the calculations for a set of values of the modeling parameters within the estimated uncertainty range of each. The methods are demonstrated for two chemical reaction systems: The N-O system, and the H-O system.
Topics: DTIC Archive, Schaibly, John H, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *REACTION KINETICS,...
Initial results from an investigation to determine the feasibility of using fuel-air-explosives (FAE) to simulate the airblast from a 1 KT nuclear blast are reported. A small scale blast facility was developed and tested. Up to 22.7 kg (50 lbs) of fuel such as propylene oxide can be disseminated through a hemispherical nozzle head containing 600 nozzles to form 9.14 m (30 ft) diameter hemispherical clouds which are subsequently detonated. The measured pressure history and impulse from several...
Topics: DTIC Archive, Sedgwick,R T, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *AIRBURST, *NUCLEAR EXPLOSION...
Two tracer-gas pressurization studies were conducted in the Mighty Epic chimney. The objectives of these tests were to evaluate gas flow within the chimney and to measure the flow from the chimney through the surrounding material to the mesa or tunnel complex. The relative gas permeability and accessible gas-filled void volume of the chimney material was estimated from this data. This report describes the test procedures, test results, and chimney material properties as inferred from the test...
Topics: DTIC Archive, Peterson, E, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *GAS FLOW, *NUCLEAR EXPLOSION...
Brief summaries of work currently underway or completed during the period from 1 October 1977 to 31 December 1977 are given in four topic areas: Source Studies, Data Analysis, Surface Wave Studies and Body Wave Studies. Also included in the report is a detailed description of a research project not previously reported. This study is entitled, Worldwide Observations of P-Wave Travel-Time Residuals. A large set of residuals compiled from ISC bulletins by Georges Poupinet of Institute de physique...
Topics: DTIC Archive, Masso, J F, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS, *SEISMIC...
The studies described in this report are directed to the construction of reliable techniques for calculating stress wave propagation in a geologic medium in the pressure range from 300 kbar down to a few bars. The medium is considered to be a composite consisting of rock matrix with water in its pores and a description of its wave propagation characteristics is sought in terms of the behavior of the isolated rock and water components. Nevada tuff is selected for the rock matrix in order to be...
Topics: DTIC Archive, Riney, T D, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *ROCK, *NUCLEAR EXPLOSIONS,...
The principal objectives of the research reported here are to identify any diagnostic differences between regional seismic phases produced by earthquakes and underground nuclear explosions and to assess their applicability to events occurring in various regions of the U.S.S.R. Two approaches are used: one employs traditional time-domain amplitude and period measurements to compare the relative excitation of various regional phases for earthquakes and explosions, while the second focuses on more...
Topics: DTIC Archive, Murphy, J R, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *DISCRIMINATION, *EARTHQUAKES,...
A prototype hydrogen, oxygen, water steam generating system has been developed. The system has been used to generate a modest amount of data relating to steam propagation through a packed sand column. A much larger capacity steam generating system based on the work completed appears to be possible.
Topics: DTIC Archive, Lagus, Peter, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSION...
The dependence of body wave magnitude (m sub b) on yield for explosions in salt is addressed. The objective is to compare Eurasian explosions in salt to hypothetical explosions in salt at Nevada Test Site (NTS) and to actual NTS explosions in granite. The coupling of the explosion energy into elastic waves is computed with a finite difference program. Four calculations were done in which all material properties were fixed except the overburden pressure. While the long period source level is...
Topics: DTIC Archive, Bache, Thomas C, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *SEISMIC WAVES,...
Major contributions in the Late Time Containment research effort are summarized. Test design activity showed that cavity venting into a tunnel could effectively lower cavity pressure on a fast time scale and that a reasonable, fast-turn-around horizontal line of sight system could be developed for satellite testing. Analysis of past experience has led to a containment summary report for Mighty Epic and much of the data for a Diablo Hawk report. A study of cavity pressure measurements confirms...
Topics: DTIC Archive, Duff,R E, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSIONS, *UNDERGROUND...
The pattern recognition code ARTHUR was tested on a limited cratering data base to examine its utility in studying complex continuous data. The code was found to be a convenient data analysis package but possessed no continuous data capability that is not already available to any researcher. (Author)
Topics: DTIC Archive, Peyton,S, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CRATERS, DATA BASES, DENSITY,...
This report summarizes the work accomplished in a twenty-four month research program directed toward resolution of technical issues arising in the seismic verification of an underground nuclear test ban treaty. Emphasis is on research conducted during the last year in five subject areas: data analysis, source studies, grout experiments, surface wave studies and body wave studies. Results are summarized for thirteen research projects. The report also includes an appendix in which abstracts are...
Topics: DTIC Archive, Bache, T. C., SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *YIELD(NUCLEAR EXPLOSIONS),...
The purpose of the study is to develop procedures for using seismic measurements to verify the number and yields of individual explosions making up a multiple event. Multiple explosion seismograms are simulated by straightforward summations of single explosion records. Several types of multiple explosions are simulated. These include closely spaced equal yield explosions (no consideration given to propagation path effects between explosions and receiver) and relatively more widely spaced...
Topics: DTIC Archive, Lambert, D G, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *NUCLEAR EXPLOSION...
An improved version of the GRAY three-phase equation of state for metals is presented in this report. The Grover model for liquid metals is modified by employing a single continuous representation of the specific heat thereby eliminating the somewhat artificial hot liquid region. A soft sphere representation is incorporated into the modified van der Waals equation of state for the vapor region yielding a model which is physically realistic at high temperatures and more compatible with the Gover...
Topics: DTIC Archive, Wray, William O, Cecil, Robert A, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA,...
The pattern recognition code ARTHUR was tested on a limited cratering data base to examine its utility in studying complex continuous data. The code was found to be a convenient data analysis package but possessed no continuous data capability that is not already available to any researcher. (Author)
Topics: DTIC Archive, Peyton,S, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CRATERS, DATA BASES, DENSITY,...
The pattern recognition code ARTHUR was tested on a limited cratering data base to examine its utility in studying complex continuous data. The code was found to be a convenient data analysis package but possessed no continuous data capability that is not already available to any researcher. (Author)
Topics: DTIC Archive, Peyton,S, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CRATERS, DATA BASES, DENSITY,...
The pattern recognition code ARTHUR was tested on a limited cratering data base to examine its utility in studying complex continuous data. The code was found to be a convenient data analysis package but possessed no continuous data capability that is not already available to any researcher. (Author)
Topics: DTIC Archive, Peyton,S, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *CRATERS, DATA BASES, DENSITY,...
In this report, constitutive relations for fluid-saturated porous media are developed in a format suitable for inclusion in standard hydrodynamic computer codes. In developing the constitutive model, it was assumed that (1) there is no relation motion between the fluid and the solid, (2) no significant heat exchange occurs between the solid and fluid phases and (3) porosity phi is a function of only the mixture pressure P sub c and fluid pressure P sub f. The last two assumptions may not be...
Topics: DTIC Archive, Garg, S K, SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA, *FLUIDS, *HYDRODYNAMIC CODES,...
