|
[Sponsors] |
November 21, 2013, 23:42 |
inflation layer, domain interface
|
#1 |
New Member
AKHILESH S L
Join Date: Sep 2013
Location: Trivandrum
Posts: 29
Rep Power: 12 |
hi friends,
while modelling a domain interface between fluid and solid, what is the way of giving inflation layer to the interface? is is essentially to give both the solid and fluid model? or is enough for giving the inflation to fluid layer only? which is the best way? |
|
November 22, 2013, 04:34 |
|
#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
In a solid you only need a mesh fine enough to resolve the gradients. In steady state the gradients are very gentle so quite a coarse mesh is often good enough. In transient simulations the mesh size required will depend on the gradients created by the temperature changes over time.
But at the end of the day you should always do a mesh sensitivity check on these things and work out exactly what your simulation requires for the accuracy you desire. |
|
November 22, 2013, 10:26 |
|
#3 |
New Member
AKHILESH S L
Join Date: Sep 2013
Location: Trivandrum
Posts: 29
Rep Power: 12 |
thank you ghorrocks
for solids it is ok and i am doing a steady state analysis only. so for fluid layer inflation is necessary in solid-fluid interface right? i need to get the correct energy balance that's why i am in a confusion. |
|
November 23, 2013, 04:39 |
|
#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
Energy balance is determined by how tight your convergence is. If you have an energy imbalance then just converge tighter. But to get the energy flow right you need an accurate simulation and that implies inflation layers, fine mesh and good emsh quality.
|
|
November 25, 2013, 00:44 |
|
#5 |
New Member
AKHILESH S L
Join Date: Sep 2013
Location: Trivandrum
Posts: 29
Rep Power: 12 |
THANK YOU ghorrocks i need the correct energy balance. the problem is i am confused on the inflation layer on the solid-fluid interface. i need to finalize whether inflation is needed for solid or liquid layer?
|
|
November 25, 2013, 01:12 |
|
#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
For most simulations you need inflation on the fluid side but not on the solid side. But you should always check this for your case with a mesh sensitivity study.
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[snappyHexMesh] SnappyHexMesh - no layer added | bejbro | OpenFOAM Meshing & Mesh Conversion | 5 | February 1, 2020 20:05 |
[ANSYS Meshing] Inflation layer / Element quality | Spookz | ANSYS Meshing & Geometry | 17 | February 12, 2019 04:55 |
[ANSYS Meshing] Is an inflation layer necessary? | ziggo | ANSYS Meshing & Geometry | 3 | July 29, 2013 11:16 |
Problem with inserting a thermal contact resistance in domain interface. | jerryx70c | CFX | 1 | March 4, 2013 14:16 |
CFX Solver Memory Error | mike | CFX | 1 | March 19, 2008 07:22 |