solution crashed after 5000 inetrations

Saima · January 23, 2017, 14:29

Hello All,

Analyzing co-rotating disc compressible turbulent flow.
Solution suddenly crashed, kindly see attached mesh and residual history.

Kindly suggest what could be the reason.

me3840 · January 23, 2017, 14:45

I don't really know what your geometry looks like, can you provide more images?

That mesh looks like it has some problems though. Only two cells in that gap and a lot of collapsed prisms on that small feature.

Saima · January 23, 2017, 15:01

Quote:

Originally Posted by me3840

I don't really know what your geometry looks like, can you provide more images?

That mesh looks like it has some problems though. Only two cells in that gap and a lot of collapsed prisms on that small feature.

kindly see attached

me3840 · January 23, 2017, 15:04

Yeah, your mesh doesn't look adequate for this. You should refine that gap, improve the prism mesh, and add more cells between the plates. The thin mesher would be a good choice here. Alternatively since you have an easy geometry you could do a directed mesh, which would be very efficient.

Saima · January 23, 2017, 15:18

Quote:

Originally Posted by me3840

Yeah, your mesh doesn't look adequate for this. You should refine that gap, improve the prism mesh, and add more cells between the plates. The thin mesher would be a good choice here. Alternatively since you have an easy geometry you could do a directed mesh, which would be very efficient.

I am not taking solid part, that's basically the fluid part. So, directed mesh does not help me.

me3840 · January 23, 2017, 15:23

Quote:

Originally Posted by Saima

I am not taking solid part, that's basically the fluid part. So, directed mesh does not help me.

I'm not sure what the solid has anything to do with this? Whatever geometry you have there could easily be directed meshed very nicely.

Saima · January 23, 2017, 18:39

Quote:

Originally Posted by me3840

I'm not sure what the solid has anything to do with this? Whatever geometry you have there could easily be directed meshed very nicely.

Thank you very much for your responses. I am new to star-ccm.

As you can see the middle part is large in thickness, I have seen tutorial of a pipe three component but its same thickness.

https://steve.cd-adapco.com/articles...-boundary-mesh

How do I managed the middle one. If i am following steps its saying on second step, error is attached.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
grid dependancy	gueynard a.	Main CFD Forum	19	June 27, 2014 21:22
Why 3D solid-pore geometry showing diverged solution?	Sargam05	OpenFOAM	0	December 3, 2012 15:45
Analytic solution for 2D steady Euler equations	jojo81	Main CFD Forum	0	October 15, 2012 12:05
IcoFoam parallel woes	msrinath80	OpenFOAM Running, Solving & CFD	9	July 22, 2007 02:58
Wall functions	Abhijit Tilak	Main CFD Forum	6	February 5, 1999 01:16

January 23, 2017, 14:45		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	I don't really know what your geometry looks like, can you provide more images? That mesh looks like it has some problems though. Only two cells in that gap and a lot of collapsed prisms on that small feature.

January 23, 2017, 15:04		#4
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	Yeah, your mesh doesn't look adequate for this. You should refine that gap, improve the prism mesh, and add more cells between the plates. The thin mesher would be a good choice here. Alternatively since you have an easy geometry you could do a directed mesh, which would be very efficient.