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Search took 0.00 seconds. Search: Posts Made By: ghorrocks
Forum: CFX September 7, 2016, 03:44
Replies: 27
Views: 3,798
Posted By ghorrocks
You cannot assess mesh quality by a few images,...

You cannot assess mesh quality by a few images, or simple mesh quality statistics. You need to do a sensitivity study to find out in your case whether it is OK.

But I see there is large mesh size...
Forum: CFX September 6, 2016, 19:11
Replies: 27
Views: 3,798
Posted By ghorrocks
As your blades are simple and straight I would...

As your blades are simple and straight I would expect there to be large separations behind the blades. Also your outlet runner has a few wiggles which will also trigger separations. Both of these...
Forum: CFX September 5, 2016, 19:53
Replies: 27
Views: 3,798
Posted By ghorrocks
That depends on the complexity of what you are...

That depends on the complexity of what you are simulating. For for a simple pump and single phase flow you should have convergence in under 100 iterations.
Forum: CFX September 5, 2016, 18:19
Replies: 27
Views: 3,798
Posted By ghorrocks
You cannot have massflow inlet and outlet. Then: ...

You cannot have massflow inlet and outlet. Then:
a) the pressure is undefined, and
b) differences in massflow between the inlet and outlet (even tiny floating point rounding effects) cannot be...
Forum: CFX August 31, 2016, 19:01
Replies: 27
Views: 3,798
Posted By ghorrocks
The problem I was talking about was not y+. It...

The problem I was talking about was not y+. It was the change in mesh size from the inflation layers to the volume mesh.

For the steady state time scale: Any of those numbers are a good starting...
Forum: CFX August 30, 2016, 02:50
Replies: 27
Views: 3,798
Posted By ghorrocks
It is best not to put inflation layers on...

It is best not to put inflation layers on interfaces. Keep the mesh size similar along streamlines as far as you can.
Forum: CFX August 29, 2016, 06:32
Replies: 27
Views: 3,798
Posted By ghorrocks
Firstly: Your post has convinced me to updated...

Firstly: Your post has convinced me to updated the FAQ on posting images on the forum. The FAQ on this is now updated to show a far better way of uploading images to the forum:...
Forum: CFX August 24, 2016, 06:05
Replies: 27
Views: 3,798
Posted By ghorrocks
You have covered many of the issues discussed on...

You have covered many of the issues discussed on the FAQ on this (But not all of them):...
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