CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Mass flow rate inlet can not get accurate pressure at inlet?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 19, 2014, 06:01
Wink Mass flow rate inlet can not get accurate pressure at inlet?
  #1
New Member
 
Pan Shaowu
Join Date: Mar 2012
Posts: 18
Rep Power: 5
pswpswpsw is on a distinguished road
As is known to all that conservative form of equations would be considered generally better than not conservative. But, it is also pointed out in Anderson's elementary CFD textbook that one weakness of conservative form is that the following conservative boundary condition might not produce the accurate value for Pressure, Velocity, Density ,etc.

I met this problem in using a commercial CFD software named CFD-ACE by ESI-group for a steady 2D heat transfer problem without turbulence. I don't know how to deal with it.

I only have the following possible solution.
1) Increase the iteration steps

Is there anyone can tell me other possible solutions?

Thank you guys for reading my letter.

Best,
Shawn
pswpswpsw is offline   Reply With Quote

Old   May 19, 2014, 11:29
Default
  #2
New Member
 
vijaymali's Avatar
 
Vijay Mali
Join Date: Apr 2014
Location: India
Posts: 18
Rep Power: 3
vijaymali is on a distinguished road
Send a message via Skype™ to vijaymali
Hi Pan,

Fundamentally mass flow rate at inlet and static pressure at outlet should do the job. It should give you correct value of total pressure to be maintained at inlet to achieve give mass flow rate.

Sorry, I do not have experience on particular software CFD-ACE. So can't comment on that.

Could you please give more details about your CFD problem setup.

Thanks
Vijay
vijaymali is offline   Reply With Quote

Old   May 24, 2014, 06:28
Default
  #3
New Member
 
Pan Shaowu
Join Date: Mar 2012
Posts: 18
Rep Power: 5
pswpswpsw is on a distinguished road
Quote:
Originally Posted by vijaymali View Post
Hi Pan,

Fundamentally mass flow rate at inlet and static pressure at outlet should do the job. It should give you correct value of total pressure to be maintained at inlet to achieve give mass flow rate.

Sorry, I do not have experience on particular software CFD-ACE. So can't comment on that.

Could you please give more details about your CFD problem setup.

Thanks
Vijay
Hi Vijay,

Thank you for your replying. I have asked my supervisor that CFD-ACE has the problem inside and I don't need to care about it. I just need to read the value close to the boundary but not right at the boundary.

Thanks,
Shaowu
pswpswpsw is offline   Reply With Quote

Reply

Tags
boundary condition

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mass flow rate prediction of Purge control valve using set pressure drop enr_venkat CFX 11 February 27, 2014 12:30
mass flow rate... sanjar OpenFOAM Running, Solving & CFD 1 December 2, 2013 01:09
Domain Reference Pressure and mass flow inlet boundary AdidaKK CFX 12 February 11, 2010 21:28
particle, parcel and mass flow rate balance flybird FLUENT 0 May 24, 2007 10:44
Target Mass Flow Rate Nitin FLUENT 6 March 12, 2004 06:39


All times are GMT -4. The time now is 22:49.