CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Validation of shear mixing layer using kwsst

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 9, 2003, 22:27
Default Validation of shear mixing layer using kwsst
Posts: n/a

We are doing a validation case on free mixing shear layer flow with your

software using a 2d grid so it can be compared with Liepman and Laufer experimental results. There is a problem accourding the boundary conditions on the domain.

the validation problem is using an input file with a function of U/Ustream = 0.5+(0.5*tanh10n), where 0.2>n>-0.3 at the inlet. the problem when this case is simulated is that there will be a reverse flow allways on the lower part pof the domain just after the inlet 0>n>-0.3.

The boundary conditions used are symmetry on the top and bottom , velocity inlet at the inlet and outflow at the end of the domain.

The problem used for the mixing shear layer is using a structured mesh.
: The points used at the inlet are 101 points at the upper part and 151 at the
: lower part. Accourding to my input file, it is showing me the right shape so i
: dont think this is the problem.
: Let me explain you the shape of the domain.
: It starts at the inlet with coordinates (1,0.2), (1,-0.3) and (10,2),
: (10,-3)at the outlet
: w
: q
: i---------------------------c y=0 (along this line)
: a
: b
: x=1 x=10
: q and w are connected
: a and b are connected
: the line qi have 101 point while ia have 151 points and since the mesh is
: structrured the lines wc have the same points as qi and cb same as ia.
: on the three lines qw, ic and ab have 200 points each.
: the reverse flow starts at the lower surface just behind the line ia (just
: some distance behind)
: the boundary conditions are set to be qw and ab symmerty
: qi and ia velocity inlet (input profile)
: and finaly wc and cb are pressure outlet. Best regards Samuell
  Reply With Quote


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
"Shear layer" vs. "mixing layer"- Difference mazadeh Main CFD Forum 6 September 17, 2019 03:26
[snappyHexMesh] Boundary layer generation problems ivan_cozza OpenFOAM Meshing & Mesh Conversion 0 October 6, 2010 13:47
"Shear layer" vs. "mixing layer"- Difference mazadeh FLUENT 2 April 18, 2008 14:46
errors Fahad Main CFD Forum 0 March 23, 2004 13:20
Validation of shear mixing layer using kwsst Samuell FLUENT 0 September 9, 2003 22:46

All times are GMT -4. The time now is 21:09.