Strongly variable and high viscosity

bergantz · June 22, 2007, 15:15

I am new to OpenFOAM but not new to CFD (I have used MFIX, PHOENICS, etc). I was wondering about OpenFOAM users experience with strongly variable and high viscosity simulations. I ask because they form an important class of problems in earth science and geo-engineering and they are "stiff" and so present real challanges for finite volume formulations

hartinger · June 23, 2007, 11:02

Hey,

i'm working on elastohydrodynamic lubrication in OpenFOAM which means logarithmic dependencies of viscosity to pressure, shear-rate and temperature coupled with elastic deformation and maximum pressure up to 0.7 GPa. Very stiff and unstable system, but OpenFOAM and the FV methodology can handle it. Other people have used OpenFOAM for polymer modelling (search the forum), which have also funny viscosities.

regards
markus

June 22, 2007, 15:15	I am new to OpenFOAM but not n	#1
bergantz New Member george bergantz Join Date: Mar 2009 Location: Seattle, Washington, USA Posts: 9 Rep Power: 17	I am new to OpenFOAM but not new to CFD (I have used MFIX, PHOENICS, etc). I was wondering about OpenFOAM users experience with strongly variable and high viscosity simulations. I ask because they form an important class of problems in earth science and geo-engineering and they are "stiff" and so present real challanges for finite volume formulations

June 23, 2007, 11:02	Hey, i'm working on elastoh	#2
hartinger Senior Member Markus Hartinger Join Date: Mar 2009 Posts: 102 Rep Power: 17	Hey, i'm working on elastohydrodynamic lubrication in OpenFOAM which means logarithmic dependencies of viscosity to pressure, shear-rate and temperature coupled with elastic deformation and maximum pressure up to 0.7 GPa. Very stiff and unstable system, but OpenFOAM and the FV methodology can handle it. Other people have used OpenFOAM for polymer modelling (search the forum), which have also funny viscosities. regards markus

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