# Flow Between Two Parallel Plate

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 March 18, 2009, 02:04 Flow Between Two Parallel Plate #1 New Member   Mustafa Ayad Join Date: Mar 2009 Posts: 8 Rep Power: 9 Hi I want to simulate the Flow Between Two Parallel Plate in fluent one of plate is moving how can i do that. Regards.

 March 20, 2009, 04:37 #2 Senior Member   Join Date: Mar 2009 Posts: 225 Rep Power: 10 Create model with two plates, then apply to one of the models UDF function describing its motion.

 March 20, 2009, 08:06 #3 New Member   Mustafa Ayad Join Date: Mar 2009 Posts: 8 Rep Power: 9 Hi friend Thanks for your replay, I want to tell you that my two plates on is horizontal and the other is incline by an angle (Alfa) how can I do the udf for for the incline plate I can do for horizontal plate . Regards. Mustafa

 March 20, 2009, 14:18 #4 Senior Member   Join Date: Mar 2009 Posts: 225 Rep Power: 10 Calculate its motion in its coordinates. Then apply this function to UDF. I would advise you to go through whole UDF Fluent Documentation and to get over UDF tutorials. As far as I remember, in UDF I guess you cannot define really displacement, the only thing (I might be mistaken, this is only what I think I remember) is to define the velocity or acceleration of one of the boundaries. For example, I would define velocity function which corresponds to your boundary motion. Then monitor (Surface->Monitors) BC motion, by dumping displacements (Grid tab in X and Y) in x and y direction into two separate files. This way from your previous calculation (I would do first a stand alone Excel, C, Python, or whatever else) verify your results comparing output from Fluent to your routine. Hope this helps, Krst

 March 21, 2009, 09:25 moving walls #5 New Member   Join Date: Mar 2009 Posts: 18 Rep Power: 9 Hello. I think there's an eaisier and faster way to do that stuff. I think you can aplly a velocity to your walls in the Boudary conditions paneL. you can fin d a part called " moiving wall" where you can define the velocity of your boundary. Let us know about the solution you choose Regards

 March 22, 2009, 17:13 #6 Senior Member   Join Date: Mar 2009 Posts: 225 Rep Power: 10 Yes, actually that is true. Forgive me, sometimes too much sophisticated work stop making you think simple way You can definitely apply velocity to your BC. Best, Krst

 March 23, 2009, 05:51 #7 New Member   Join Date: Mar 2009 Posts: 18 Rep Power: 9 hi Don't worry about your answer, which is more accurate than mine.

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