CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Flapping fin thrust in FLUENT

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

LinkBack Thread Tools Display Modes
Old   July 5, 2012, 16:58
Default Flapping fin thrust in FLUENT
New Member
Ajinkya Desai
Join Date: Jun 2012
Posts: 6
Rep Power: 7
jinks is on a distinguished road
hey, I am simulating an oscillating/flapping fin in FLUENT. I plotted the cd vs the flow time and if the time averaged Cd comes out negative then it amount to a net THRUST rite? I need to know if this is the best way of calculating thrust. Also i should tell you, that for this oscillating fin, the average drag is coming out positive, contradictory to our hypothesis. Some one please help me with this.

Thank you.
jinks is offline   Reply With Quote

Old   July 5, 2012, 17:30
Join Date: Jun 2009
Posts: 96
Rep Power: 10
meangreen is on a distinguished road
It depends what surface you are defining your drag. (also on how you are defining your force) Think about it, it is going to be positive for one surface/phase and negative for the other. As air flows over a fin there will be a negative drag force for the air (the air is decelerating as it drags across the fin) but positive for the fin (the equal and opposite drag force from the air is implemented onto the fin).
meangreen is offline   Reply With Quote

Old   July 19, 2013, 19:34
Default Cd vs Flow time
New Member
Mohammad Ashraf Hossain
Join Date: Sep 2012
Posts: 7
Rep Power: 7
cgpa4 is on a distinguished road
I want to plot the curve for Cd vs flow time for a flow past cylinder. I tried by going to surface. But its not working. Please help me on it.

cgpa4 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
Two questions on Fluent UDF Steven Fluent UDF and Scheme Programming 4 September 20, 2013 16:30
Error in reading Fluent 13 case file in fluent 12 apurv FLUENT 2 July 12, 2013 07:46
Fluent 6.3 32bit vs Fluent 12.0 64bit ibex7 FLUENT 7 April 18, 2011 02:44
Problems in lauching FLUENT Lourival FLUENT 3 January 16, 2008 17:48
2D flapping foil- moving ref frame model in Fluent VJ FLUENT 0 October 20, 2007 01:15

All times are GMT -4. The time now is 07:35.