|
[Sponsors] |
August 4, 2013, 06:31 |
Gravity Components for Inclined Channel
|
#1 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
Hi, I am a new user to Fluent. I have a 3D inclined channel say 5 degree inclined from horizontal(X-axis) on XY plane. While enabling gravity, what will be the X, Y and Z components of gravity. Flow is from lower to higher elevation. A small explanation would be highly appreciated. Will it be 0,-9.81,0 or 9.81sin5,-9.81cos5,0 or something else?
For a 2D vertical channel(upward flow) X and Y components are 0 and -9.81.(From a Fluent tutorial). |
|
August 17, 2013, 04:00 |
|
#2 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
Does anybody have any idea about it??
|
|
August 17, 2013, 05:44 |
|
#3 |
Super Moderator
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,427
Rep Power: 49 |
The direction of the gravity vector is entirely your choice.
No one here knows in which direction gravity is pointing in your simulation. |
|
August 18, 2013, 10:41 |
|
#4 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
Thanks for your reply..Gravity is acting downward.And I want gravity effects to be included..For 5 degree inclination from X-direction(with flow from bottom to higher level)...I guess..there has to be a fixed set of gravity components to see appropriate results(Specially in cases, when flow is in opposite direction,i.e. from higher to lower level,flow will take place just because of gravity.)
|
|
December 27, 2013, 06:33 |
|
#5 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
I was wondering if anyone could answer that.
|
|
December 27, 2013, 08:54 |
|
#6 |
Senior Member
Join Date: Jan 2010
Location: Germany
Posts: 268
Rep Power: 17 |
You have to know that the gravity vector is written as : g(vector): (gx,gy,gz)
A picture of your problem would be better to have an understanding of the orientation of the geometry! |
|
December 28, 2013, 02:46 |
|
#7 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
Here is the image. Fluid is flowing from left to right. I need to know the gravitational acceleration components to be entered in fluent general section.
Inclination is 5 degree from horizontal. |
|
December 28, 2013, 03:01 |
|
#8 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
In figure it is horizontal(isometric view), but if it has to be inclined at 5 degree from X-axis, how one will incorporate the gravity effects.
|
|
December 28, 2013, 06:03 |
|
#9 |
Senior Member
Join Date: Jan 2010
Location: Germany
Posts: 268
Rep Power: 17 |
still the same direction in y-direction (based on your description)
|
|
December 28, 2013, 06:34 |
|
#10 |
New Member
Ashish Jain
Join Date: Jul 2013
Posts: 10
Rep Power: 13 |
In Y-direction, it will be same as before. Inclination is with respect to X-axis only. Does it make it clearer? Let me know plz.
|
|
Tags |
channel flow, fluent, gravity |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Open Channel Flow | ElanMorin | FLUENT | 4 | February 25, 2015 17:26 |
Gravity source term in PisoFoam | DanM | OpenFOAM Running, Solving & CFD | 4 | May 24, 2013 12:30 |
Convergence problem when use gravity | aroma | STAR-CCM+ | 1 | April 10, 2013 11:18 |
Question on Gravity | archdevil | Main CFD Forum | 9 | May 16, 2012 14:31 |
tecplot 3D velocity contours inside a channel | vetnav | Tecplot | 4 | July 14, 2010 21:03 |