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userfunctions:coulomb [Elmer/Ice Wiki]

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userfunctions:coulomb [2015/11/26 15:50]
gag [Examples]
userfunctions:coulomb [2015/12/02 12:24] (current)
gag [General Description]
Line 33: Line 33:
   * ''​Friction Law Linear Velocity''​ -> <​m>​u_{t0}</​m>  ​   * ''​Friction Law Linear Velocity''​ -> <​m>​u_{t0}</​m>  ​
  
-The effective pressure is defined as <m>N = -sigma_{nn} -p_w</​m>, ​ where <​m>​sigma_{nn}</​m>​ is the normal Cauchy stress and <​m>​p_w</​m>​ the water pressure. If a variable ''​Effective Pressure''​ exists, it is used to evaluate directly <​m>​N ​=</m>. Else, the normal Cauchy stress is estimated from the stress computed at previous timestep. The water pressure is prescribed as an ''​External Pressure''​ (Negative - Compressive convention, and therefore '​External Pressure'​ should be equal to the opposite of the water pressure in the sif). +The effective pressure is defined as <m>N = -sigma_{nn} -p_w</​m>, ​ where <​m>​sigma_{nn}</​m>​ is the normal Cauchy stress and <​m>​p_w</​m>​ the water pressure. If a variable ''​Effective Pressure''​ exists, it is used to evaluate directly <​m>​N</​m>​. Else, the normal Cauchy stress is estimated from the stress computed at previous timestep. The water pressure is prescribed as an ''​External Pressure''​ (Negative - Compressive convention, and therefore '​External Pressure'​ should be equal to the opposite of the water pressure in the sif). 
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userfunctions/coulomb.txt ยท Last modified: 2015/12/02 12:24 by gag
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