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problem relative to variable material properties
Posted 2011年12月20日 GMT-5 02:07 Heat Transfer & Phase Change, Materials, Parameters, Variables, & Functions Version 4.2a 1 Reply
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(all are in the .pdf attachment. Thanks)
Hi, everyone,
Recently, I have tried to build a temperature-dependent material properties, but it fails because of some certain unknown reason. Would you mind checking it and giving me some guidance? Thanks a lot.
According to all what I know, I definite three "Piecewise function"s just under the Model 1 --> Materials --> Material 1 --> Basic branch, just shown in Fig. 1.
In order to check its validity, I defined a local variable with the name of “dp” (see Fig. 2) to visualize it. While after I solve the model, I come to the Result --> 2D plot group --> surface, and use the variable “dp” to present the expression to plot the density distribution in the domain, which should be different due to the temperature difference. The
“Unknown function or operator.
-Name : dTS
-Plot: surf1(Surface)”
error occurs. I am quite puzzle about this. Please give me some guidance. Thanks.
Best wishes to you and your family.
Yours
FM Huang
Dec.20th,2011
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1 Reply Last Post 2011年12月20日 GMT-5 03:08
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Posted:
1 decade ago
I have solve this problem. because there is a Piecewise function under the "Material"--> "Basic" branch, hence , the right citation is
"mod1.mat1.def.d(mod1.T[1/k])" or similar (using the T instead).