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Fundamental study on flow resistance in rock fissures
213A mixture model. Permeability and shear strength data were obtained at room temperature and pressure before and after the thermal property measurements. Both properties were found to increase by more than an order of magnitude after pressurization and heating. The shear strength increase is consistent with SEM examination which indicates the formation of a precipitate that might have caused cementing of platelets. The observed increase in permeability is as yet unexplained. 846056 Analysis of heat and mass transfer in subseabed disposal of nuclear waste Hickox, C E; Gartling, D K; McVey, D F; Russo, A J; Nuttall, H E Marine Geotectmol V5, N3-4, 1984, P335-360 Numerical results are obtained for a specified model problem. One program, MARIAH, provides descriptions of the temperature and fluid velocity fields induced by the presence of a container of nuclear waste. A second program, IONMIG, which uses the results of the thermal analysis, predicts the migration of 4 representative radionuclides: Pu, Cs, I and Tc. P e r m e a b i l i t y and capillarity See also: 846151 846057 Effects of dust suppressants on tailing sand permeability. Technical note Scott, J C Geotech Test J VT, N1, March 1984, P41-44 846058 Study of membrane-permeant compatibility. Technical note Rad, N S; Acar, Y B Geotech Test J V7, N2, June 1984, P104-106
Membrane-fluid compatibility for permeability tests may be studied using the testing equipment and procedures described. It is concluded that: (1) different types of membrane exhibit various deformation characteristics on exposure to organic fluids, (2) different organic fluids have different effects on a given type of membrane, (3) deformability of latex membrane in contact with an organic fluid decreases as the dielectric constant of the fluid increases, and (4) the effects of the organic fluids used on the latex membranes are found to be reversible. 846059 Finite element formulation for brine transport in rock salt Ratigan, J L lnt J Num Anal Meth Geomech V8, N3, May-June 1984, P225-241 A set of coupled field equations is developed for transport of liquid brine in natural rock salt. The natural rock salt consists of individual crystals brought together so that only a portion of the crystal faces or grain boundaries contribute to the hydraulically connected pore space. Transport of brine inclusions within individual crystals is considered to be thermally driven; whereas transport along crystal interfaces or grain boundaries is considered to be pressure driven. The field equations for both transport mechanisms are developed and incorporated in a finite element program. An analytical solution to a one-dimensional boundary value problem is derived and compared to the finite element solution. An application of the finite element code to radioactive waste emplacement is briefly discussed. Auth.
84606O Finite element seepage flow nets. Short communication Aalto, J lnt J Num Anal Meth Geomech V8, N3, May-June 1984, P297-303 A variational principle and the corresponding finite element equations for determination of the stream function for soil seepage problems is given using the standard finite element potential solution as data. The procedure is very simple and independent of the element type employed. Generalization of the method to multiply connected domains is included. Auth. 846061 Seepage analysis in a zoned anisotropic medium by the boundary element method. Short communication Chugh, A K; FaNcy, H T lnt J Num Anal Meth Geomech V8, N4, July-Aug 1984, P399-407 A simple and effective extension to the boundary element method for solving Laplace's equation for boundary value problems is presented to solve steady confined and/or steady unconfined seepage problems in zoned anisotropic media. Sample problems indicating the accuracy of results are given. Auth. 846062 Fundamental study on flow resistance in rock fissures Sato, K; Watanabe, K; Kotajima, N Soils Found V24, NI, March 1984, PI-8 Presents a flow analysis and resistance law for an elementary fissure having irregular and rough walls in the interstitial channel. The method differentiates between tortuosity and roughness of the walls: this is done using a finite difference method of the Navier-Stokes and vorticity equations. An experimental spectral analysis was also carried out on fracture samples from granite rocks and this is used with the results of permeability tests to propose a formula for seepage flow through a single fracture. Compressibility, swelling and c o n s o l i d a t i o n See also: 846020 846063 Investigation of numerical errors in the analysis of consolidation by finite elements Reed, M B Int J Num Anal Meth Geomeeh V8. N3, May-June ]984, P243-257
A smoothing technique is developed to remove the oscillatory errors in initial nodal pore pressures, associated with the use of quadratic isoparametric elements to model soil consolidation. Numerical results using this technique are compared with the performance of other types of element in problems of one- and two-dimensional consolidation. Auth. 846064 Boundary integral equation method for linear porons-elasticity with applications to soil consolidation Cheng, A H D; Liggett, J A Int J Num Meth Engng V20, N2, Feb 1984, P255-278
846065 Prediction of consolidation of very soft soil Cargill, K W J Geotech Engng Div ASCE VIIO, NGT6, June 1984, P775795
Membrane-fluid compatibility for permeability tests may be studied using the testing equipment and procedures described. It is concluded that: (1) different types of membrane exhibit various deformation characteristics on exposure to organic fluids, (2) different organic fluids have different effects on a given type of membrane, (3) deformability of latex membrane in contact with an organic fluid decreases as the dielectric constant of the fluid increases, and (4) the effects of the organic fluids used on the latex membranes are found to be reversible. 846059 Finite element formulation for brine transport in rock salt Ratigan, J L lnt J Num Anal Meth Geomech V8, N3, May-June 1984, P225-241 A set of coupled field equations is developed for transport of liquid brine in natural rock salt. The natural rock salt consists of individual crystals brought together so that only a portion of the crystal faces or grain boundaries contribute to the hydraulically connected pore space. Transport of brine inclusions within individual crystals is considered to be thermally driven; whereas transport along crystal interfaces or grain boundaries is considered to be pressure driven. The field equations for both transport mechanisms are developed and incorporated in a finite element program. An analytical solution to a one-dimensional boundary value problem is derived and compared to the finite element solution. An application of the finite element code to radioactive waste emplacement is briefly discussed. Auth.
84606O Finite element seepage flow nets. Short communication Aalto, J lnt J Num Anal Meth Geomech V8, N3, May-June 1984, P297-303 A variational principle and the corresponding finite element equations for determination of the stream function for soil seepage problems is given using the standard finite element potential solution as data. The procedure is very simple and independent of the element type employed. Generalization of the method to multiply connected domains is included. Auth. 846061 Seepage analysis in a zoned anisotropic medium by the boundary element method. Short communication Chugh, A K; FaNcy, H T lnt J Num Anal Meth Geomech V8, N4, July-Aug 1984, P399-407 A simple and effective extension to the boundary element method for solving Laplace's equation for boundary value problems is presented to solve steady confined and/or steady unconfined seepage problems in zoned anisotropic media. Sample problems indicating the accuracy of results are given. Auth. 846062 Fundamental study on flow resistance in rock fissures Sato, K; Watanabe, K; Kotajima, N Soils Found V24, NI, March 1984, PI-8 Presents a flow analysis and resistance law for an elementary fissure having irregular and rough walls in the interstitial channel. The method differentiates between tortuosity and roughness of the walls: this is done using a finite difference method of the Navier-Stokes and vorticity equations. An experimental spectral analysis was also carried out on fracture samples from granite rocks and this is used with the results of permeability tests to propose a formula for seepage flow through a single fracture. Compressibility, swelling and c o n s o l i d a t i o n See also: 846020 846063 Investigation of numerical errors in the analysis of consolidation by finite elements Reed, M B Int J Num Anal Meth Geomeeh V8. N3, May-June ]984, P243-257
A smoothing technique is developed to remove the oscillatory errors in initial nodal pore pressures, associated with the use of quadratic isoparametric elements to model soil consolidation. Numerical results using this technique are compared with the performance of other types of element in problems of one- and two-dimensional consolidation. Auth. 846064 Boundary integral equation method for linear porons-elasticity with applications to soil consolidation Cheng, A H D; Liggett, J A Int J Num Meth Engng V20, N2, Feb 1984, P255-278
846065 Prediction of consolidation of very soft soil Cargill, K W J Geotech Engng Div ASCE VIIO, NGT6, June 1984, P775795