I wanted to simulate a 4-cylinder engine transient heat transfer. Because the combustion in cylinders has delay and not at the same time, I wanted to give different times for setting heat-flux on cylinder liners.
You could run your simulation with the initial set of conditions until finishing the first period. Then you can start the next period with the new set of conditions and take the results from the first period as its new starting point.
If you are using FLUENT, you can add "execute commands" to change the boundary condition for every number of timesteps.
If you can apply an open boundary condition at the beginning, t=0, can you apply a time series t= nt, n=1, ..., T of boundary conditions ? This is possible say in atmospheric or oceanic numerical models. Maybe modify the model accordingly?
I advise you to run two simulations ( two boundary conditions) if there is no function according to which the flux varies with time. Good luck.
Thank you very much for your guide,In FLUENT I can give a tabular data that changes at different times, which must be entered separately in FLUENT command log. But other programs like AVL FIRE have table data option in every data input section.
- Badges
- Science topic