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

Ahmed Body Simulation

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

Like Tree1Likes
  • 1 Post By Saima

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 9, 2009, 08:05
Default Ahmed Body Simulation
  #1
New Member
 
Pin
Join Date: Jul 2009
Posts: 2
Rep Power: 0
nick is on a distinguished road
Dear All,
I am pretty fresh on CFD simulation. Currently I am doing a simulation on Ahmed Model with 25deg slant angel in Fluent. I am looking for the Drag Coefficient. According to the experiment results (SR Ahmed 1984), the pressure drag coefficient at the front part is around 0.02, the back part is around 0.08 and the slant surface is around 0.15.

The Simulation was under following Setting:

Hex Mesh with around 4 million cells
Domain is 9.2(x) x 1.87(y) x 1.4(z)
LES Viscous model
BC:
40m/s inlet velocity
Symmetry the sides and top of the domain

“References Values”
Area: 0.112m^2
Length: 0.288m
Velocity: 40m/s
Viscosity: 1.79 x 10^-5

I tried to record the “Cd” on x-direction for all surfaces from the Fluent function: Solve, Monitors, Force. However, the results of are really bad. The “Cd” of the front part = 0.3, back part = 0.1 and slant part = 0.05

I want to know how to get the results of pressure drag coefficient from Fluent?

The equation of the Drag Coefficient is Cd = (drag force)/(0.5 * density * A * V^2)

Thanks a lot on help!
Nick
nick is offline   Reply With Quote

Old   March 26, 2010, 16:37
Default
  #2
Senior Member
 
Saima
Join Date: Apr 2009
Location: Canada
Posts: 185
Rep Power: 16
Saima is an unknown quantity at this point
Hi,

I am working on Ahmed Body, IS there anybody has material about it?

Thanks in advance!!!
Saima

Last edited by Saima; March 28, 2010 at 21:38.
Saima is offline   Reply With Quote

Old   March 26, 2010, 16:37
Default
  #3
Senior Member
 
Saima
Join Date: Apr 2009
Location: Canada
Posts: 185
Rep Power: 16
Saima is an unknown quantity at this point
Quote:
Originally Posted by nick View Post
Dear All,
I am pretty fresh on CFD simulation. Currently I am doing a simulation on Ahmed Model with 25deg slant angel in Fluent. I am looking for the Drag Coefficient. According to the experiment results (SR Ahmed 1984), the pressure drag coefficient at the front part is around 0.02, the back part is around 0.08 and the slant surface is around 0.15.

The Simulation was under following Setting:

Hex Mesh with around 4 million cells
Domain is 9.2(x) x 1.87(y) x 1.4(z)
LES Viscous model
BC:
40m/s inlet velocity
Symmetry the sides and top of the domain

“References Values”
Area: 0.112m^2
Length: 0.288m
Velocity: 40m/s
Viscosity: 1.79 x 10^-5

I tried to record the “Cd” on x-direction for all surfaces from the Fluent function: Solve, Monitors, Force. However, the results of are really bad. The “Cd” of the front part = 0.3, back part = 0.1 and slant part = 0.05

I want to know how to get the results of pressure drag coefficient from Fluent?

The equation of the Drag Coefficient is Cd = (drag force)/(0.5 * density * A * V^2)

Thanks a lot on help!
Nick
Is there anybody has material about it.

Last edited by Saima; March 28, 2010 at 21:39.
Saima is offline   Reply With Quote

Old   March 26, 2010, 17:23
Default
  #4
Senior Member
 
sega's Avatar
 
Sebastian Gatzka
Join Date: Mar 2009
Location: Frankfurt, Germany
Posts: 729
Rep Power: 20
sega is on a distinguished road
Use GAMBIT!
__________________
Schrödingers wife: "What did you do to the cat? It's half dead!"
sega is offline   Reply With Quote

Old   May 10, 2010, 10:40
Default
  #5
Senior Member
 
Saima
Join Date: Apr 2009
Location: Canada
Posts: 185
Rep Power: 16
Saima is an unknown quantity at this point
I have completed AHmed Body 3D meshing I cant upload here because size is moore then 100KB, if somebody needs send me an email ill send it.
pugal456 likes this.
Saima is offline   Reply With Quote

Old   December 24, 2018, 11:13
Default
  #6
New Member
 
Hamza
Join Date: Dec 2018
Posts: 1
Rep Power: 0
Mohammadhamzaazam is on a distinguished road
Mohammadhamzaazam015@gmail.com
Mohammadhamzaazam is offline   Reply With Quote

Reply

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
Drag over Ahmed body Shamoon Jamshed FLUENT 2 May 18, 2009 14:15
Can't get good results on ahmed body research Michael Main CFD Forum 8 September 17, 2008 13:55
please lol Ahmed Body benzamia FLUENT 0 February 27, 2007 14:08
Flow around the ahmed body (large eddy simulation) Benzamia CFX 0 February 26, 2007 05:03
AHMED BODY (LARGE EDDY SIMULATION) Benzamia FLUENT 0 February 26, 2007 04:59


All times are GMT -4. The time now is 05:41.