Floating Point Segregated Flow Solver Error

bonztee · January 6, 2018, 15:11

Hi
I have set up a rotational and translational body using RANS k-Epsilon. However when I start running the simulation I immediately get the following error:
A floating point exception has occurred: floating point exception [invalid operation]. The specific cause cannot be identified.
Context: star.segregatedflow.SegregatedFlowSolver
What should I look at changing?
Thanks.

ashokac7 · January 8, 2018, 08:44

You can start with reducing URF for the solvers. But if there is problem with mesh or solver set up then reducing URF will not work. So it is good practice to first check mesh, solver etc. Otherwise state detail problem and set up etc to comment more

patilsachin · March 7, 2018, 02:55

Quote:

Originally Posted by ashokac7

You can start with reducing URF for the solvers. But if there is problem with mesh or solver set up then reducing URF will not work. So it is good practice to first check mesh, solver etc. Otherwise state detail problem and set up etc to comment more

This answer actually helped in another problem that I was working on with Segregated Energy Solver.

Reducing the URF did the trick

steve lee · March 7, 2018, 20:52

Hello.
You should check these things..

1. Mesh
2. Initial condition

if you can not find any problem #1 and #2, you should control URF.

still you find the same problem..

You should control B.C..
for example.. your problem has 100 bar pressure difference between in and out..
you set the pressure difference like 5 bar.. and after few steps.. 10 bar.. like this.

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January 6, 2018, 15:11	Floating Point Segregated Flow Solver Error	#1
bonztee New Member Join Date: Jan 2018 Posts: 1 Rep Power: 0	Hi I have set up a rotational and translational body using RANS k-Epsilon. However when I start running the simulation I immediately get the following error: A floating point exception has occurred: floating point exception [invalid operation]. The specific cause cannot be identified. Context: star.segregatedflow.SegregatedFlowSolver What should I look at changing? Thanks.

January 8, 2018, 08:44		#2
ashokac7 Senior Member Ashok Chaudhari Join Date: Aug 2016 Location: Pune, India Posts: 260 Rep Power: 10	You can start with reducing URF for the solvers. But if there is problem with mesh or solver set up then reducing URF will not work. So it is good practice to first check mesh, solver etc. Otherwise state detail problem and set up etc to comment more

March 7, 2018, 20:52		#4
steve lee Member Steve Join Date: Mar 2018 Location: South Korea Posts: 69 Rep Power: 8	Hello. You should check these things.. 1. Mesh 2. Initial condition if you can not find any problem #1 and #2, you should control URF. still you find the same problem.. You should control B.C.. for example.. your problem has 100 bar pressure difference between in and out.. you set the pressure difference like 5 bar.. and after few steps.. 10 bar.. like this.