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hatef January 23, 2013 20:06

Time dependent material properties
Hey all,

How do I assign time dependent material properties?
Your help will be much appreciated!:)


Lance January 24, 2013 04:50

well, this will work:
1000 [kg/m^3]*t*1[s^-1]
then just assign the expression to your material.

hatef January 24, 2013 05:03

Thanks for your reply, I actually tried to use that, but it doesn't work on its own! I guess CFX generates a table for temp. and pres. dependent material properties before the actual numerical iteration starts in order to reference them during simulation. I was wondering if I can manually generate a table for time!?

Lance January 24, 2013 05:59

yep, use a user function. See e.g.

hatef January 24, 2013 13:27

I have done time dependent boundary condition before, that works fine. But when it comes to defining a new material with time dependent properties, it doesn't like it!

Lance January 25, 2013 03:25

OK, i see - maybe CFX wont allow time-dependent material properties for some reason. What are you trying to achieve? Maybe it can be done in another way?

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