[akshaymanikjade]

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]

Finally I did this motion.

[immortality]

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

[akshaymanikjade]

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

[poya0070]

Originally Posted by akshaymanikjade

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]

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

[rpareshr]

Originally Posted by akshaymanikjade

Finally I did this motion.

hi @akshaymanikjade can u send me that udf which you made for translating and sinusoidal motion of fish and fluent procedure to link it. i made for my problem but many error . my email id rpareshr2@gmail.com

[Alexander00]

Originally Posted by akshaymanikjade

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.

Hello Akshay, i'm currently trying perform a numerical simulation of the fish tail motion in ANSYS for my Btech project.
could you help me with the udf?
my email id is - abhishiktchbns@gmail.com

[fadoobaba]

Stuck at same problem.