Hi Asha Joseph

when you set a boundary condition as wall. ANSYS  maintains zero velocity condition on all the walls and there isn't any need to change this boundary condition. For more information you could use this link for  a tutorial about Simulation of Wave Generation in a Tank. It would help you.

willem.engen.nl/uni/fluent/documents/external/wave.pdf

Good Luck

Hi 

Thank you 

I hope you are mentioning about  ANSYS FLUENT. Earlier I did it in fluent like that. Due to some problems encountered  in system coupling, i can't go  forward in that direction.

Now I am modelling in ANSYS WORKBENCH using ACOUSTIC extension. My doubt is about the contact option to be provided in ANSYS WORKBENCH  modal and harmonic analysis

Dear Asha

Frictionless contact type could be good choice between other types. in this type, individual bodies sense each other, so they are not allow to penetrate in to each other but at the same time they can separate from each other easily. it should be mentioned that frictional type  has the same behavior but it would be time consuming.

Dear Aidin

Is it possible to provide frictionless contact to any kind of analysis? ie.  is it possible for modal analysis, harmonic analysis and time history analysis

Dear Asha,

Absolutely yes. but it should be mentioned that in modal analysis, the initial condition of contact elements is important, so if they stick together, ANSYS will suppose that situation continue during the solution.

if you wanted to solve the problem in other condition (for instance two bodies separate from each other) , you would use prestress modal analysis.

Dear Aidin

Thank you.