[gbrajtm]

Hi,

I am trying to implement HB model (Discussed in this thread) in transient analysis. Below is the CEL code I used. But I am getting an error (see attachment) any specific reason for this error.

CEL:
&replace EXPRESSIONS:
Bounded = min(max(Shear Strain Rate,MinValue[s^-1]),MaxValue[s^-1])
HB = ((1-exp(nu0*Bounded/tau0))*((tau0/Bounded)+K*Bounded^(n-1)))
K = 2 [Pa s^0.3]
MaxValue = 1.0e+10
MinValue = 1.0e-10
n = 0.3
nu0 = 0.6 [Pa s]
tau0 = 4000 [kg m^-1 s^-2]
END
END
END

[TitusOfei]

Hi, floating error could be due to anything including poor meshing as well transient solution setup.
Again looking at your values, nu0 is too small and tau0 is too large. I think you have interchanged these values. Have a second look.

[Lance]

Originally Posted by gbrajtm

K = 2 [Pa s^0.3]

Im not sure that CFX accept non-integer exponents.

[Gert-Jan]

I don't think it has anything to do with poor meshing ot transient solution setup, since your message already appears in the initialisation (see error messaage).
So, I think Titus is correct that something is wrong with your expression.
Did you evaluate the expressions in Pre, using the plotting function?
Alternatively, perform a first run with mild (small range) settings to get a reasonable initial guess and then your final case with the first run as initial guess.

[gbrajtm]

Originally Posted by TitusOfei

Hi, floating error could be due to anything including poor meshing as well transient solution setup.
Again looking at your values, nu0 is too small and tau0 is too large. I think you have interchanged these values. Have a second look.

Thank you, It was an issue with the values....

[gbrajtm]

Originally Posted by Gert-Jan

I don't think it has anything to do with poor meshing ot transient solution setup, since your message already appears in the initialisation (see error messaage).
So, I think Titus is correct that something is wrong with your expression.
Did you evaluate the expressions in Pre, using the plotting function?
Alternatively, perform a first run with mild (small range) settings to get a reasonable initial guess and then your final case with the first run as initial guess.

yes, values in the expressions were wrong....Thank you