CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

rhoCentralFoam - kOmegaSST - Floating point exception

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   December 8, 2015, 12:24
Default rhoCentralFoam - kOmegaSST - Floating point exception
New Member
Join Date: Nov 2015
Posts: 2
Rep Power: 0
DGW is on a distinguished road
Hello everyone,

I don't really have a single question but I am faced with a simulation problem I haven't been able to solve, so I hope someone here can help me.

I am no CFD expert but for my master thesis in mechanical engineering I have to simulate then build a linear aerospike nozzle to accelerate high pressure air to super sonic speed.

For the simulation I created a mesh using gmsh, imported it to foam and I am using the rhoCentralFoam solver with the kOmega turbulence model.

The simulation starts "fine" but crashes after 6 microseconds... The error log I get is this:

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::sigFpe::sigHandler(int) at ??:?
#2  ? in "/lib/x86_64-linux-gnu/"
#3  Foam::hePsiThermo<Foam::psiThermo, Foam::pureMixture<Foam::sutherlandTransport<Foam::species::thermo<Foam::hConstThermo<Foam::perfectGas<Foam::specie> >, Foam::sensibleInternalEnergy> > > >::calculate() at ??:?
#4  Foam::hePsiThermo<Foam::psiThermo, Foam::pureMixture<Foam::sutherlandTransport<Foam::species::thermo<Foam::hConstThermo<Foam::perfectGas<Foam::specie> >, Foam::sensibleInternalEnergy> > > >::correct() at ??:?
#5  ? at ??:?
#6  __libc_start_main in "/lib/x86_64-linux-gnu/"
#7  ? at ??:?
Floating point exception (core dumped)
which looks like something is numerically "exploding" in the computation of the temperature (correct me if I am wrong).

Here is a link to the whole simulation case. I copy/pasted the error log from the terminal at the end of the "Log" file. The "spike26deg_mm.geo" and "spike26deg_mm.msh" are respectively the geometry and mesh file from GMSH. I set a write frequency of 1e-06 second because I wanted to see what was "happening" before the crash of the simulation.

You should be able to run the sim just like I did and toy around with the initial and boundary conditions. The inlet pressure is pretty high (6 atmospheres) but that's not the problem since the same problem occurs with 2 atmospheres.

If you want any more details, feel free to ask. I will post any breakthrought I get.



Last edited by DGW; December 9, 2015 at 10:38. Reason: error in the turbulence model used.
DGW is offline   Reply With Quote

Old   September 1, 2016, 07:45
New Member
Join Date: Aug 2016
Posts: 26
Rep Power: 9
yeya is on a distinguished road
did you solve the issure?
yeya is offline   Reply With Quote


aerospike, floating point exception, komegasst, rhocentralfoam, super sonic

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
icoFoam floating point exception (8) leizhao512 OpenFOAM Running, Solving & CFD 7 November 1, 2018 11:43
Floating point exception (core dumped) for GAMG solver yuhou1989 OpenFOAM Running, Solving & CFD 2 March 24, 2015 19:28
Inlet Velocity Profile BC - Floating Point exception during solution initialization Janshi STAR-CCM+ 4 March 14, 2012 10:21
Pipe flow in settlingFoam floating point exception jochemvandenbosch OpenFOAM Running, Solving & CFD 4 February 16, 2012 03:24
block-structured mesh for t-junction Robert@cfd ANSYS Meshing & Geometry 20 November 11, 2011 04:59

All times are GMT -4. The time now is 07:22.