[[solvers:stress]]
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solvers:stress [2013/04/21 13:57]
mschafer [SIF contents] 		solvers:stress [2016/01/20 09:34]
gag [General Description]
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 <m>sigma_{ij}  = 2 {eta}  {epsilon}_{ij} - p delta_{ij} </m> \\ <m>sigma_{ij}  = 2 {eta}  {epsilon}_{ij} - p delta_{ij} </m> \\
  
-where <m>epsilon</m> is directly evaluated from the velocity field and <m>p</m> is the isotropic pressure. +where <m>epsilon</m> is directly evaluated from the velocity field and <m>p</m> is the isotropic pressure.The convention is that a positive stress corresponds to a tensiile stress (opposite to the isotropic pressure convention). 
  
 This solver doesn't work for the GOLF anisotropic ([[solvers:aiflow|AIFlow Solver]]) and the snow/firn ([[solvers:porous|Porous Solver]]) rheologies. Nevertheless, these two solvers have intrinsic functions which allow to compute the stress directly.  This solver doesn't work for the GOLF anisotropic ([[solvers:aiflow|AIFlow Solver]]) and the snow/firn ([[solvers:porous|Porous Solver]]) rheologies. Nevertheless, these two solvers have intrinsic functions which allow to compute the stress directly. 
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   !-----------------------------------------------------------------------   !-----------------------------------------------------------------------
   Flow Solver Name = String "Flow Solution"   Flow Solver Name = String "Flow Solution"
-  ! the name of the stress solution (default is 'stress') +  ! no default value anymore for "Stress Variable Name"
-  ! make sure in that case to have Exported Variable 1 = "stress"!!+
   Stress Variable Name = String 'Sigma'   Stress Variable Name = String 'Sigma'
   !-----------------------------------------------------------------------   !-----------------------------------------------------------------------
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 ==== Examples ==== ==== Examples ====
-Download an example using this solver. TODO +A 2D example can be found in ''[ELMER_TRUNK]/elmerice/Tests/ComputeDevStress''.
 ==== Reference ==== ==== Reference ====
-When used this solver can be cited using the following references:\\+This solver can be cited using the following references:\\
 Gagliardini O., D. Cohen, P. Råback and T. Zwinger, 2007. Finite-Element Modeling of Subglacial Cavities and Related Friction Law. J. of Geophys. Res.,  Earth Surface, 112, F02027. Gagliardini O., D. Cohen, P. Råback and T. Zwinger, 2007. Finite-Element Modeling of Subglacial Cavities and Related Friction Law. J. of Geophys. Res.,  Earth Surface, 112, F02027.
solvers/stress.txt · Last modified: 2016/01/20 09:34 by gag
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