CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Running a high Re low mach rhoPimpleFoam

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 15, 2022, 14:56
Question Running a high Re low mach rhoPimpleFoam
  #1
New Member
 
Join Date: Nov 2022
Posts: 7
Rep Power: 4
CaptCrash is on a distinguished road
Hello everyone!
I am a long time reader, first time poster. I am trying to run a rhoPimpleFoam for a steady state high reynolds number low mach airfoil but running into a supersonic flow solution. Here are the pertinent simulation parameters
Chord (m): 10.85838
Re: 95,624,744
Angle of Attack (deg): 5

Uxyz (m/s): [128.1220, 11.20922, 0]
Uinf (m/s): 128.611
Minf (Mach): 0.378
Tinf (K): 288.15
Pinf (Pa): 101325
rho (kg/m^3): 1.225
Pr: 0.7323
Hf (j/kg): 2.8833272E5

Y+ target: 30
Turbulence Properties: RAS, kOmegaSST, I = 0.01%

k: 2.48E-4
nut: 1.2E-2
omega: 2.07E-2


I've attached as many of the files as possible to this string to help. I used gmsh for the mesh generation and those files are included as well to generate a full mesh which, after generating and saving the mesh in gmsh, can be converted using gmshToFoam <file_name.msh>. I considered running a normalized chord (1 meter) in water at 107.404m/s. The issue being this will be part of a series of test to generate CL/CD/CM plots up to the trans-sonic regime so I would like to capture those effects. Thank you very much in advance for your assistance.
Attached Images
File Type: png mach2.4.png (109.2 KB, 15 views)
Attached Files
File Type: zip gmshfiles.zip (3.9 KB, 1 views)
File Type: zip 0-const-system-folders.zip (11.2 KB, 3 views)
CaptCrash is offline   Reply With Quote

Old   November 16, 2022, 19:07
Default Follow up information
  #2
New Member
 
Join Date: Nov 2022
Posts: 7
Rep Power: 4
CaptCrash is on a distinguished road
The following information is what I calculated for the inflation layers. The grid is a C-H grid. I've included an image of the C-H grid, the computations for the inflation layers, and the checkMesh output. The C-H grid has has the following properties.

Screenshot from 2022-11-16 14-56-18.jpg
BAC310 AIR.jpg
checkmeshreport.txt
CaptCrash is offline   Reply With Quote

Old   November 19, 2022, 14:45
Default
  #3
New Member
 
Join Date: Nov 2022
Posts: 7
Rep Power: 4
CaptCrash is on a distinguished road
I think one issue stems from the high aspect ratio mesh cells. I am using GMSH but I can not figure out how to generate an inflation layer and maintain a structured CH mesh. Every topic or example I've seen has been an inflation layer connected to an unstructured mesh. I used this video (slowed down to 25% playback):https://www.youtube.com/watch?v=bekRbU7rtZE as the basis for generating the mesh, except for the wake spacing. I tried using snappyHexMesh earlier in the process but the blender plugin doesnt seem to work on linux for some reason.


Thanks in advance for any help.
CaptCrash is offline   Reply With Quote

Reply

Tags
airfoil, high reynolds number, low mach, rhopimplefoam, supersonic

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
high Temperature shoot up and high mach flow. skdubey ANSYS 1 February 19, 2022 07:35
demarcation between high Re number and Low Re number pdewcfd Main CFD Forum 0 March 31, 2021 04:24
High Mach number flow Taendyr Main CFD Forum 8 November 29, 2020 08:15
Multiphase, high Mach simulations alexvaleije FLUENT 0 June 6, 2019 07:53
replacing of shock tube high pressure part with a boundary condition for low pressure immortality Main CFD Forum 0 May 2, 2013 14:30


All times are GMT -4. The time now is 10:10.