dynamic viscosity=f(pressure)

hubidoo · June 15, 2009, 10:21

Hey,

there is a relationship between the dynamic viscosity and the pressure (see pic). Does anyone know, how to set up in CFX 11.0?

ckleanth · June 15, 2009, 11:10

what do you want to do?

hubidoo · June 15, 2009, 12:12

Quote:

Originally Posted by ckleanth

what do you want to do?

Calculate with a variable dynamic viscosity. Like Sutherlands Formula, just with dynamic viscosity=f(pressure)

ckleanth · June 15, 2009, 12:51

you can define a cel function for dynamic viscosity but CFX doesent like that very much.

you have a number models to chose for non newtonian fluids like the
Sutherlands Formula, Bingham, Bird Carreau, Herschel Bulkley, etc

ask your ANSYS representative for examples

June 15, 2009, 11:10		#2
ckleanth Senior Member George Join Date: Mar 2009 Location: Birmingham, UK Posts: 257 Rep Power: 18	what do you want to do? __________________ Top 4 tips 1. Knowledge is everything and Ignorance is dangerous. 2. Understand your limitations and try to eliminate them. 3. Get yerself a bike and hoon the chuffer. You will soon learn why dogs like to hang their heads out the car window. 4. Please before asking any questions on how to run simulations in CFX, go though all the tutorials

June 15, 2009, 12:51		#4
ckleanth Senior Member George Join Date: Mar 2009 Location: Birmingham, UK Posts: 257 Rep Power: 18	you can define a cel function for dynamic viscosity but CFX doesent like that very much. you have a number models to chose for non newtonian fluids like the Sutherlands Formula, Bingham, Bird Carreau, Herschel Bulkley, etc ask your ANSYS representative for examples __________________ Top 4 tips 1. Knowledge is everything and Ignorance is dangerous. 2. Understand your limitations and try to eliminate them. 3. Get yerself a bike and hoon the chuffer. You will soon learn why dogs like to hang their heads out the car window. 4. Please before asking any questions on how to run simulations in CFX, go though all the tutorials

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