Dear all,
The OGS version 5.4.01 has been released.
Release note: (https://svn.ufz.de/ogs/wiki/ReleaseNotes)
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OpenGeoSys 5.4.01 (WX,AS,JM,TN)  20130412
 Coupled THM time controlled excavation. A new key word ($EXCAVATION ) in .bc file is introduced for the boundary conditions of the hydraulic or thermal process during the “time controlled” excavation. The excavation boundary can be found automatically. A coupled excavation process can be simulated. (see also benchmarks/HM/excavation)
#BOUNDARY_CONDITION
$PCS_TYPE
LIQUID_FLOW
$PRIMARY_VARIABLE
PRESSURE1
$DIS_TYPE
CONSTANT 1E5
$EXCAVATION
1 1
Under the key word $EXCAVATION two parameters are needed. The first one in current OGS version must be ‘1’. The second parameter is the material group index of the excavated elements. For the excavation boundary conditiion the $GEO_TYPE is not required.
 Neglect H initial effect. The impact of the initial pore pressure is considered during coupled HM modelling (LIQUID_FLOW, RICHARDS_FLOW, MULTI_PHASE_FLOW). A new key word ($NEGLECT_H_INI_EFFECT ) in .pcs file is needed.
$NEGLECT_H_INI_EFFECT
1
One parameter is required, and its value can be 1 or 2. If it’s ‘1’, the stress0 is directly modified with initial pore pressure. If it’s ‘2’, the initial pore pressure is stored, which means more memory is allocated and the initial pressure is used by calculation RHS.
 Anisotropic plasticity with MohrCoulomb criterion.
short description of the theory
Benchmark examples please see benchmarks/M/AnisoPlas
 Dependence between storage coefficient and the minimum principal stress. New key word $STORAGE_FUNCTION_EFFSTRESS in .mmp file.
$STORAGE_FUNCTION_EFFSTRESS
1 1
Two values are required. The first one must be ‘1’. The second value is the curve number, which define the relationship between the storage coefficient and the minimum principal stress.
 Dependence between permeability and the minimum principal stress. New key word $PERMEABILITY_FUNCTION_EFFSTRESS in .mmp file.
$PERMEABILITY_FUNCTION_EFFSTRESS
1 1
Two values are required. The first one must be ‘1’. The second value is the curve number, which define the relationship between the permeability and the minimum principal stress.

Automatically calculate storage coefficient from the stiffness parameters (Young’s modulus, Poisson ratio) of anisotropic material by the coupled LIQUID_FLOW and DEFORMATION modelling.

New creep model, BGRb and BGRsf.
Best regards
Wenjie