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

Definition of Velocity Boundary Condition in Ansys CFD software

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 3, 2021, 12:50
Default Definition of Velocity Boundary Condition in Ansys CFD software
  #1
New Member
 
Sridhar Sahoo
Join Date: Sep 2014
Location: IIT KGP
Posts: 13
Rep Power: 12
SRI28337 is on a distinguished road
In a constant volume chamber, we did 6 hole nozzle injector to simulate gas (methane) injection simulation. As part of the inlet boundary condition, we used velocity inlet boundary condition (i.e. 25m/s) for all the nozzles.
The results obtained are so confusing
1. The mass flow rate of each nozzle is different from the other.
2. With the increase in injection velocity, the simulation fails stating "Recycling requested by state variable update" and fails finally saying timestep driven is too small.
Why this phenomenon occurs.
The constant volume chamber is closed from every side, and nitrogen is filled in the chamber.
SRI28337 is offline   Reply With Quote

Reply

Tags
ansys, cfd, forté, velocity boundary

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
The method on dealing with velocity in static pressure outlet boundary condition mona.li CFX 2 September 30, 2017 02:33
Problem in setting Boundary Condition Madhatter92 CFX 12 January 12, 2016 05:39
Wrong flow in ratating domain problem Sanyo CFX 17 August 15, 2015 07:20
Low Mixing time Problem Mavier CFX 5 April 29, 2013 01:00
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55


All times are GMT -4. The time now is 17:55.