[mech_01]

Hello All,

I would really appreciate it if someone has time to help me with the following CFD simulation in Fluent.

I plan on simulating hot air recirculation which occurs when there are numerous dry coolers located next to each other on a roof of a building. Eventually the simulation will include wind effects also but first of all I will be starting with a simple simulation with one dry cooler as a base point to see if I am going in the right direction.

The issue I am facing is that I do not want to model the internal components of the dry cooler since that will use up to much computer resources. What I would like to model is a Dry Cooler with a fixed heat rejection and a fixed air flow and with such a model the dry cooler discharge air temperature will rise when the dry cooler intake air rises due to air recirculation.

The ideal model for the simulation would be for the air to enter the dry cooler intake face then to be heated and discharged by the fan at a fixed air flow rate. I have attached a picture of the dry cooler I am trying to model (picture: dry cooler ideal model)

In fluent I have tried to model the dry cooler with simplified internal components but this leads to too many elements being used up and also since the model is simplified i am getting high temperature hot spots for the internals of the dry cooler which I am not interested in this simulation (picture: dry cooler fluent).

Any help leading me in the right direction would be greatly appreciated.

Thanks and best regards,