CFD Online Logo CFD Online URL
Home > Forums > CFX

pipe problem boundary conditions(please help me to solve this)

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

LinkBack Thread Tools Display Modes
Old   May 8, 2012, 03:53
Default pipe problem boundary conditions(please help me to solve this)
New Member
Join Date: Mar 2012
Posts: 7
Rep Power: 6
mahesh9 is an unknown quantity at this point
Sponsored Links
i have to apply boundary conditions for a straight pipe with same diameter through out with 1 inch length and .35 inches dia.

flow rate =.00026
inlet pressure 5000psi
fluid =skydrol
i want to get the outlet pressure
when i am giving static pressure the solver is considering the total pressure also the same.this flow is through hydraulic system and it s outlet is not in contact with atmosphere.
while defining fluid domain what should be the relative pressure for this particular case.????
mahesh9 is offline   Reply With Quote
Sponsored Links

Old   May 8, 2012, 04:18
Join Date: Feb 2012
Location: UK
Posts: 40
Rep Power: 7
tauqirnawaz is on a distinguished road
I presume the flow rate is in [kg/s] and velocity is in [m/s].
Because this is very short length of pipe, you would have to define your boundary conditions away from the actual ones i.e increase the length of the pipe. You can define inlet as mass flow while the outlet as an opening.
tauqirnawaz is offline   Reply With Quote

Old   May 8, 2012, 06:59
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,737
Rep Power: 106
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Mahe - firstly, please do not PM me duplicate of your posts. Do not turn your posts into spam.

Following on from Raja's comment - your pipe is so small that the flow will be dominated by upstream and down stream effects. You cannot model a 1 inch by 0.35 inch diamater pipe in isolation and hope to get meaningful answers.
ghorrocks is offline   Reply With Quote


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
Problem with assigned inlet velocity profile as a boundary condition Ozgur_ FLUENT 5 August 25, 2015 04:58
Problem with a periodic boundary condition chuck209 CFX 10 May 9, 2012 16:15
Problem with "symmetryPlanne" boundary condition fcuevas OpenFOAM Running, Solving & CFD 1 March 14, 2012 06:07
CFX13 Post Periodic interface EtaEta CFX 7 December 8, 2011 18:15
a problem with Boundary condition M Rad Main CFD Forum 12 November 27, 1998 13:49

Sponsored Links

All times are GMT -4. The time now is 04:02.