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-   -   How to generate Fish motion (http://www.cfd-online.com/Forums/fluent/108919-how-generate-fish-motion.html)

akshaymanikjade November 5, 2012 04:22

How to generate Fish motion
 
Hi all,

I am relatively new to ANSYS Fluent and am trying to impose a simple UDF to move airfoil in x-direction as well as undulate (move in sinusoidal form) to generate the fish motion.
When i simulate this two motion individually it seems to be fine and when try to simulate both at a time i.e. fish undulate as well as move in x-direction, i get shape like snake movement and negative volume generated.
pls help me in this regard so that how can i simulate both motion simultaneously to get required effect.

akshaymanikjade December 16, 2012 09:04

Finally I did this motion.

immortality February 9, 2013 06:00

hi
How did you do that?what was the problem?

akshaymanikjade February 9, 2013 06:11

This is done by using define grid motion Macro of UDF and hook it via dynamic mesh pane.

poya0070 September 8, 2013 10:35

Quote:

Originally Posted by akshaymanikjade (Post 390256)
Hi all,

I am relatively new to ANSYS Fluent and am trying to impose a simple UDF to move airfoil in x-direction as well as undulate (move in sinusoidal form) to generate the fish motion.
When i simulate this two motion individually it seems to be fine and when try to simulate both at a time i.e. fish undulate as well as move in x-direction, i get shape like snake movement and negative volume generated.
pls help me in this regard so that how can i simulate both motion simultaneously to get required effect.

Hi akshay
im trying to undulate the foil same u but not familiar with udf...and problem to write and compile it.
can u help and guide me?
poya0070@gmail.com
Regards
P.A

Rahul123 January 29, 2014 12:54

Hey akshay,
I am trying to simulate a similar problem...can you upload the udf...it ll be of grt help


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