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

Wrong results for Cl and Cd (straight line)

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 30, 2012, 01:24
Default Wrong results for Cl and Cd (straight line)
  #1
New Member
 
Low Chan Kit
Join Date: May 2012
Posts: 2
Rep Power: 0
Melon Kit is on a distinguished road
Hi,

I have try to run a simulation for the water flows through a 2D circular body. There are still straight line for Cl and Cd even though I have run the simulation which duration is 140 secs.

The values which I used in the Setup are shown as follows:
1) Re=1000 (turbulent flow) where density =1000, viscosity= 0.001, diameter of the circle =1m and velocity of the flow is 0.001m/s.

2) The scheme used is PISO (Skewness correction and Neighbor correction both are 1), turbulent model used is realizable k-epsilon (standard near-wall treatment), turbulent intensity is 6.747% and turbulence length is 0.07m (both are calculated from formula ontained from a paper)

3) Backflow values all were set to be 0 at pressure outlet and absolute criteria is 1e-6

4) Time step is 1400, time step size is 0.1s and iteration is 10.

I am wondering where the mistakes come out. Thanks for the kindly reply and help.

Regards,
Kit
Melon Kit is offline   Reply With Quote

Old   August 30, 2012, 10:48
Default
  #2
New Member
 
Low Chan Kit
Join Date: May 2012
Posts: 2
Rep Power: 0
Melon Kit is on a distinguished road
Help please. Thanks a lot~
Melon Kit is offline   Reply With Quote

Reply

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



All times are GMT -4. The time now is 18:46.