|
[Sponsors] |
November 20, 2007, 00:12 |
Mass loss/change help when cylinder shrink?
|
#1 |
Guest
Posts: n/a
|
Hi,
I'm using a 2d NS fractional step code to simulate flow past a cylinder. I'm using an o-grid. In the computational scheme, there is no special mass correction required. Supposed after some time the cylinder will deform/morph/shrink into a smaller cylinder slowly until the radius is now half the original, do I need to do any special correction computation since the mass of cylinder is now smaller? Btw, the shrinking cylinder is modelled using deforming grid. However, the overall computational domain size remains the same. Thank you. |
|
November 20, 2007, 09:56 |
Re: Mass loss/change help when cylinder shrink?
|
#2 |
Guest
Posts: n/a
|
You will need to ensure that geometric conservation is preserved. The original paper is an AIAA paper by Thomas and Lombard. Try googling geometric conservation.
|
|
November 20, 2007, 13:55 |
Re: Mass loss/change help when cylinder shrink?
|
#3 |
Guest
Posts: n/a
|
Thanks ag. I'm aware of geometric conservation. What I am more interested in is whether there are other things which I need to consider as a result of change of mass/volume of the body.
There shouldn't be, right? |
|
November 20, 2007, 14:08 |
Re: Mass loss/change help when cylinder shrink?
|
#4 |
Guest
Posts: n/a
|
As long as you account for the grid volume changes via geometric conservation and you have accounted for the grid motion in the construction of the flux terms then you should be OK.
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
mass flow in is not equal to mass flow out | saii | CFX | 12 | March 19, 2018 06:21 |
Water subcooled boiling | Attesz | CFX | 7 | January 5, 2013 04:32 |
Calculating Sloshing mass in a cylinder | satellite_control | FLOW-3D | 0 | June 20, 2011 06:34 |
Added Mass in a 2-D Cylinder | Rahul Bharadwaj | Main CFD Forum | 0 | March 2, 2005 14:11 |
Added Mass in a 2-D Cylinder | Rahul Bharadwaj | FLUENT | 0 | March 2, 2005 13:51 |