# Solving Non-Dimensional model equations in Fluent for Porous media?

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 November 21, 2021, 08:54 Solving Non-Dimensional model equations in Fluent for Porous media? #1 New Member   Rajendra Kumar Join Date: Feb 2016 Posts: 7 Rep Power: 9 The query is regarding the initialization of the temperature field in porous media. I have my model equations in non-dimensional (ND) form (2D). The dimensionless temperature ranges from 0 to 1. The (hot) fluid is coming to the porous media and the non-dimensional temperature (theta) at the inlet is 1, and the porous medium (LTE model) is at theta=0. I am initializing from the inlet (where theta =1) and patching the porous medium at theta=0. However, I am getting the following message in the console. "temperature limited to 1.000000e+00 in 60400 cells on zone 2". And an initial condition theta=0 is not displayed in the contours. Help will be greatly appreciated. __________________ Regards, Rajendra

 November 21, 2021, 10:32 #2 Senior Member   Kumaresh Join Date: Oct 2016 Posts: 346 Rep Power: 10 Hello, Could you please explain your governing equations ? Thank you

November 21, 2021, 10:41
#3
New Member

Rajendra Kumar
Join Date: Feb 2016
Posts: 7
Rep Power: 9
Quote:
 Originally Posted by Kummi Hello, Could you please explain your governing equations? Thank you
@Kummi

Thanks for the quick response. I have non-dimensionalized the energy equation for porous media using the local thermal equilibrium approach. So, the Peclet number is the ND number I am having, along with the ND temperature (theta), where theta =(T-T_min)/(T_max.-T_min).
Kindly let me know if another detail is required.
I have altered the material properties and all as per Fluent's governing equation though.
__________________
Regards,
Rajendra

 November 21, 2021, 12:04 #4 New Member   Rajendra Kumar Join Date: Feb 2016 Posts: 7 Rep Power: 9 I resolved the issue. The Limits are by default set from 1 K- 5000 K, so the message in the console was popping out. Upon setting the limit to 0 K solves the problem. However, this is not a recommended practice for dimensional equations. __________________ Regards, Rajendra

 Tags initial conditions, mesh 2d, non-dimensional