problem with defining expression in CFX

  • Last Post 12 December 2018
  • Topic Is Solved
hamda posted this 12 December 2018


I  want to define the following equation for energy source:

410040 [W m^-3]*((t^-0.0639 )- (35424000+t)^-0.0639)


My problem is that since CFX is so sensitive to dimension I have to rewrite the equation like this:

410040 [W m^-3 s^0.0639]*((t^-0.0639 )- (35424000[s]+t)^-0.0639)

But I still can't run and get error.


It should be mentioned  that in the equation, time is considered without dimension. I mean in the equation just the magnitude of time is important.


I got these messages:

In Analysis 'Flow Analysis 1' - Domain 'Solid': Transient analyses require that initial conditions are specified unless an Initial Values file is specified at run-time.

In Analysis 'Flow Analysis 1' - Output Control: No intermediate transient results files have been defined.


abenhadj posted this 12 December 2018

Try with 410040 [W m^-3]*((t/1[s])^(-0.0639)-(35424000+(t/1[s]))^(-0.0639))

Best regards,


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