Fluent won't start iterating

  • Last Post 07 May 2018
Weiqiang Liu posted this 25 April 2018

Hi all,

I am doing a three-way catalyst simulation with Fluent. The  three dimensional model includes 140000 elements and 80 surface reactions on the catalytic wall. All the mechanism, thermodynamic and transport data are imported into Fluent with chemkin format.

however when I start calculation, it got stuck at the interface like follows:


The iteration can not start.

Do anybody know what is the reason?



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Raef.Kobeissi posted this 29 April 2018

what are your PC specs? what is the size of your mesh? Dependent on both answers, I might be able to help.


Raef Kobeissi

Weiqiang Liu posted this 03 May 2018

Hi Raef,

The specification of my PC is AMD Ryzen 7 1700X eight core 3.4 GHz, 8GB RAM. My geometry is a 1mm diameter and 30 mm length square channel including 140000 and 80 surface reactions.

Do you think it's the limitation of the computation capability?



Raef.Kobeissi posted this 06 May 2018

The number of elements is small. I am not sure why it is not running. Can you attach your workbench case file? From the Specs you mentioned it should run it without any problem

Raef Kobeissi

Weiqiang Liu posted this 07 May 2018

Hi Raef,

This is my case file. I really appreciate your kindness.