CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Strange axial velocity distribution in swirling flow

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

LinkBack Thread Tools Search this Thread Display Modes
Old   August 25, 2020, 13:08
Default Strange axial velocity distribution in swirling flow
Join Date: Jan 2017
Posts: 32
Rep Power: 8
aravind vashista is on a distinguished road
Hi all,
I am simulating swirl flow burner. The burner has central fuel jet and an swirling air which comes from the annulus. The central jet has velocity of 32.7 m/s in the axial direction. The swirling air has bulk axial and tangential velocity of 38.2 and 19.1 m/s. I use velocity inlet boundary for both fuel and swirling air flow. I use cylindrical component to specify swirling air boundary condition. I specify axial and tangential velocity while giving radial and angular velocity =0.00. When I perform calculation, I strangely get regions of high axial velocity and low velocity regions which are diametrically opposite as shown in the figure. I don't know why this happens, I believe axial velocity should be uniform for the entire annulus. If someone could tell me where I am wrong or explain this strange distribution it will be very useful for me

Thank you
Attached Images
File Type: jpg vaxial inlet.jpg (70.2 KB, 4 views)
File Type: jpg vaxial streamwise location.jpg (82.1 KB, 4 views)
aravind vashista is offline   Reply With Quote


axial velocity, cylindrical coordinates, swirl flow, velocity inlet

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
Flow distribution in porous domain (CFX) CFXer CFX 4 July 28, 2020 20:45
Bulk Axial Velocity for vertical pipe flow thedal Main CFD Forum 0 July 20, 2020 08:07
High velocity in Laminar flow Manojmech FLUENT 0 November 3, 2016 05:37
Velocity of flow v time MitsubishiEvo6 FLUENT 0 August 31, 2012 00:51
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13

All times are GMT -4. The time now is 01:22.