Coupled Flow Simulation

  • Last Post 16 January 2019
ashiadarsh posted this 10 January 2019

Hi All,

  How can I go for a coupled simulation in ANSYS FLUENT? I have to simulate compressible flow in one part of the domain and Incompressible flow in other part separated by a solid wall..The physics and numerical methods in the two domain is entirely different..Is it possible to simulate two different physics together.

Thanking You,



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rwoolhou posted this 10 January 2019

You can't model using two different solvers. However, how compressible are the materials? Pressure Based Coupled Solver may be sufficient. 

cfd_learner posted this 10 January 2019

What I understand, you would like to solve different density materials. You can try with two fluid zones and give them their corresponding density (ideal gas and constant/incomp. ideal gas respectively). Try and let us know.    

ashiadarsh posted this 11 January 2019

Please refer to the fig. attached

ashiadarsh posted this 11 January 2019

Computational domain will be sector of 360 deg. consisting of gas domain,solid domain & the coolant(liquid) domain.Gas domain is highly compressible while the coolant domain is Incompressible. In this case whether a coupled formulation is possible?

Usual approach to such problems is first to solve the gas domain independently and impose the boundary condition(the results obtained from the gas domain) on (SOLID+FLUID) thus solving the conjugate heat transfer problem.

I would like to know instead of that,if we can solve for all the three domains simultaneously?


rwoolhou posted this 11 January 2019

What density range do you see over the gas phase: if it's a heat exchanger I wouldn't expect much of a pressure loss, so all the density change is likely to be temperature related. 

ashiadarsh posted this 15 January 2019

This is not an heat exchanger...compressible flow is through a convergent-divergent nozzle

rwoolhou posted this 16 January 2019

With a separate jacket? Please can you put a better image of the whole domain up?