about consistency index of power law fluids

fluid_mech · April 24, 2014, 04:35

Dear Foamers,
I have a question about consistency index of power law fluids (k) in power law viscosity model of openFoam. Due to definition of power law fluid, this parameter has the unit of (Pa.s^n). n is the power law index of fluid. In order to implementing this model to openFoam, the consistency index should be divided by density ( due to posts presented in forum) , but this can not explain the unit presented in openFoam for k: m^2/s which is independent of n !!!
Thanks

fs.chemech · July 7, 2014, 02:36

Hi fluid-mech!!

I have the same doubt as you. Have you found an explanation for it?

Cheers,

FS

April 24, 2014, 04:35	about consistency index of power law fluids	#1
fluid_mech New Member Join Date: Apr 2014 Posts: 1 Rep Power: 0	Dear Foamers, I have a question about consistency index of power law fluids (k) in power law viscosity model of openFoam. Due to definition of power law fluid, this parameter has the unit of (Pa.s^n). n is the power law index of fluid. In order to implementing this model to openFoam, the consistency index should be divided by density ( due to posts presented in forum) , but this can not explain the unit presented in openFoam for k: m^2/s which is independent of n !!! Thanks

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July 7, 2014, 02:36		#2
fs.chemech New Member Filippo Join Date: May 2014 Posts: 27 Rep Power: 12	Hi fluid-mech!! I have the same doubt as you. Have you found an explanation for it? Cheers, FS