CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Appropriate Boundary conditions for jet flow in open domain

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 5, 2014, 11:27
Default Appropriate Boundary conditions for jet flow in open domain
  #1
New Member
 
Shruti Sarma
Join Date: Aug 2014
Posts: 1
Rep Power: 0
shrutidhara.123 is on a distinguished road
HI there!

I have been trying to solve flow past a bluff body in open domain. This particular problem poses some confusion to me regarding the boundary conditions imposed on the problem. The figs. for the open computational domain and physical domain are attached.

The bluff body would be placed near to the inlet (Velocity inlet) but in the open domain. I imposed pressure-far-field condition on wall 1, 2 and 3. Rest of the boundary conditions have been specified in the fig. 2.

Fig1. shows the physical domain we are trying to mimic. Flow from the cylinder exits into the open domain. The flow in the open domain (just outside the cylinder) is met by the bluff body kept in the center line.

Steady state simulation was adopted for the case with structured mesh (Fig.3). The following queries are bothering me and I would really appreciate if anyone could help me with it as I didn't find any other similar problem solved.

1. The size of the bluff body is 6 by 10mm. So is the domain size appropriate (mm) ?? . (x refers to 20 mm in the fig2).

2. Boundary condition used for the wall 1,2 and 3 was pressure-far-field and leads to divergence . What should be the appropriate BC?

Any help would be really appreciated .
Attached Images
File Type: jpg IMG-20140802-WA0000.jpg (13.8 KB, 33 views)
File Type: jpg IMG-20140802-WA0001.jpg (19.0 KB, 39 views)
File Type: png mesh.png (20.5 KB, 30 views)
shrutidhara.123 is offline   Reply With Quote

Reply


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
mass flow in is not equal to mass flow out saii CFX 12 March 19, 2018 06:21
Trouble compiling utilities using source-built OpenFOAM Artur OpenFOAM Programming & Development 14 October 29, 2013 11:59
centOS 5.6 : paraFoam not working yossi OpenFOAM Installation 2 October 9, 2013 02:41
Open Channel Flow Boundary Conditions. rahulrp FLUENT 0 December 1, 2010 08:32
open channel flow boundary conditions yan FLUENT 0 July 5, 2005 00:36


All times are GMT -4. The time now is 14:27.