CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Hydraulic diameter for multiple ducts

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

LinkBack Thread Tools Display Modes
Old   August 23, 2013, 01:45
Default Hydraulic diameter for multiple ducts
New Member
Jalay Shukla
Join Date: Aug 2013
Posts: 11
Rep Power: 6
jalay is on a distinguished road
I am making a simulation of gas diffusion in room.
In which continuous air is coming from 4 ducts and 4 exhausts are there and gas is introduced from some place inside the room.

I have used k-e model with realizable and with buoyancy effect. Is this correct for this simulation?
And what should be the hydraulic diameter for 4 ducts? Do i need to make 4 individual inlets and give BC to them OR can i give BC to all at single BC,by multiple selection. and what should be the hydraulic diameter that case?
jalay is offline   Reply With Quote

Old   August 23, 2013, 02:34
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 723
Rep Power: 15
vasava will become famous soon enough
It is advised to keep your inlet and outlets individual and not bunch them in to groups. So you can keep the 4 inlets and 4 outlets separate and calculate hydraulic diameter separately for each inlet and outlet.
vasava is offline   Reply With Quote

Old   August 23, 2013, 04:17
Senior Member
Philipov's Avatar
Svetlin Filipov
Join Date: Mar 2009
Location: United Kingdom
Posts: 176
Rep Power: 10
Philipov is on a distinguished road
It depends on the mesh model. If your inlets are not connected before entering the room then you should set BC for each inlet. If you are using circular cross section of pipes then pipe diameter is the hydraulic diameter, else there is a good formula to calculate it.
Philipov 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
equivalent diameter vs hydraulic diameter swamysrikanth FLUENT 1 October 12, 2013 01:18
[GAMBIT] hydraulic diameter? Zweeper ANSYS Meshing & Geometry 6 January 4, 2010 01:44
hydraulic diameter in 2d ahsan FLUENT 2 August 28, 2009 15:22
Importance of Hydraulic Diameter Value for Compressible Flow RyGuy FLUENT 0 August 6, 2009 10:58
Hydraulic Diameter - Series of Holes Jop FLUENT 2 August 16, 2007 07:29

All times are GMT -4. The time now is 18:23.