Conditional Expression in CFX Pre

Danial Q · May 28, 2012, 02:04

yes it does, >= can work as greater than or equal to.....what i am confused about is how to define a range if(1725.5[K]<=T<=1726.5[K],

will it work if i do it like u showed above??T<1726.5 and T > 1725.5[K]

is AND allowed in syntax FOR EXPRESSION by cfx.?? or i should use &&

Thanks

Lance · May 28, 2012, 03:14

You misunderstood. You cannot use expressions like 234 <= T <= 345 as it is not a valid format. I think & or && might work, see the documentation?

Why not use a 1D user function if you only want to assign temperature dependent properties?

Danial Q · May 28, 2012, 03:37

Thanks i got ur point but a bit late and did it. it worked. I din t use 1D interpolation because my problem involves latent heat in it so ,it was not gonna work, itried it earlier.

Thanks again

Danial Q · May 28, 2012, 03:49

Q# if we have two domains (fluid and solid) and they are interconnected with interface. For heat released by fluid should be necessarily defined as a "SOUrce" by creating subdomain in solid
OR
due to presence of interface, it will be transfered automatically to the solid domain which is at very low temp regrading fluid domain????

May 28, 2012, 02:04	Hi Lance	#81
Danial Q Senior Member Danial Join Date: Nov 2011 Posts: 179 Rep Power: 14	yes it does, >= can work as greater than or equal to.....what i am confused about is how to define a range if(1725.5[K]<=T<=1726.5[K], will it work if i do it like u showed above??T<1726.5 and T > 1725.5[K] is AND allowed in syntax FOR EXPRESSION by cfx.?? or i should use && Thanks

May 28, 2012, 03:37	HI Lance	#83
Danial Q Senior Member Danial Join Date: Nov 2011 Posts: 179 Rep Power: 14	Thanks i got ur point but a bit late and did it. it worked. I din t use 1D interpolation because my problem involves latent heat in it so ,it was not gonna work, itried it earlier. Thanks again

May 28, 2012, 03:49	Hi LANCE	#84
Danial Q Senior Member Danial Join Date: Nov 2011 Posts: 179 Rep Power: 14	Q# if we have two domains (fluid and solid) and they are interconnected with interface. For heat released by fluid should be necessarily defined as a "SOUrce" by creating subdomain in solid OR due to presence of interface, it will be transfered automatically to the solid domain which is at very low temp regrading fluid domain????

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May 28, 2012, 03:14		#82
Lance Senior Member Lance Join Date: Mar 2009 Posts: 669 Rep Power: 22	You misunderstood. You cannot use expressions like 234 <= T <= 345 as it is not a valid format. I think & or && might work, see the documentation? Why not use a 1D user function if you only want to assign temperature dependent properties?