|
[Sponsors] |
July 27, 2016, 08:46 |
Pipe Flow Simulation
|
#1 |
Member
Zhiyi Li
Join Date: Mar 2015
Location: Germany
Posts: 43
Rep Power: 11 |
Dear all,
In order to provide the inflow data for LES simulation, I am now conducting a pipe flow simulation. I am using the ID-DES method with non-uniform boundary conditions and pimpleFoam for the simulation. The diameter of my pipe is 4.25 mm, the length of the pipe is 4 times diameter and cyclic boundary condition. The yplus is smaller than 1 and mostly round 0.2, courant numer smaller than 0.5. According to the pipe diameter, velocity and viscosity, the Reynolds Number should be around 8000-10000, because i set the bulk velocity of 60m/s. I didn't start the average process. When I check the profile of 0.1s, the profile looks like laminar, there is not turbuence created. Something like that in the attachment. lU_0.0045.jpg Also the velocity profile. U_plot_0.0045.jpg. But there should be turbulence for me to use the averaging process, otherwise the simulation is not useful for my LES simulation. Anyone knows if there are some problems with my simulation? Please give me some tips if you have a clue. Thank you very much Best regards Litchy |
|
July 27, 2016, 08:52 |
|
#2 |
Member
Zhiyi Li
Join Date: Mar 2015
Location: Germany
Posts: 43
Rep Power: 11 |
The figures I put before is for the time of 0.0045.
You can see the figures for the time of 0.1 here: U_0.1.jpg plot_U_0.1.jpg |
|
July 27, 2016, 10:11 |
|
#3 |
Senior Member
Cedric DUPRAT
Join Date: Mar 2009
Location: Nantes, France
Posts: 195
Rep Power: 17 |
Dear Litchy,
you might find this thread useful to do what you expect. There are some guidelines for your preprocessing. http://www.cfd-online.com/Forums/ope...pipe-flow.html if you have other question(s), let the forum know. Best regards Cedric |
|
July 27, 2016, 10:40 |
|
#4 |
Member
Zhiyi Li
Join Date: Mar 2015
Location: Germany
Posts: 43
Rep Power: 11 |
Thank you Cedric, i got some useful recommendations and I'll try them to see if it works
|
|
Tags |
id-des, inflow generation, pipe flow |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Wind Tunnel Flow Simulation Mass Flow BC Issue | ledelman | SU2 | 4 | August 3, 2014 18:38 |
Y pipe flow simulation | iv1985 | CFX | 2 | June 24, 2014 01:35 |
Blockage in pipe ( using solidwork flow simulation) | jchow | FloEFD, FloWorks & FloTHERM | 1 | January 16, 2012 16:03 |
About Turbulence Intensity (Pipe flow assimilated) | gRomK13 | Main CFD Forum | 1 | July 10, 2009 03:11 |
FDTD Simulation of flow through tapered pipe | Jim | Main CFD Forum | 3 | December 25, 2006 10:56 |