In the current study, the heat transfer rate and pressure drop for the flow on the heat exchanger tube bundle with the two triangular and rectangular arrangements were computed experimentally using Grimson and Zukauskas equations and the ANSYS Fluent Software. Prior to running simulation in the ANSYS Fluent, the tubes bundle geometry was designed by the use of SOLIDWORKS Software, and then it was meshed by the ANSYS Software. The meshing was done 16 times for each arrangement. After the simulation, the results were compared to the experimental values obtained from Grimson and Zukauskas equations and their differences and reasons were discussed in the form of charts. It can be concluded from the experimental computations by Grimson and Zukauskas equations and comparing them with the results obtained from simulation of the intended models in the ANSYS Fluent Software (tables) that in the S_L/D constant ratios (the ratio of distance between the two tubes to radius of one tube in the direction of flow), by the increase in ST/D (the ratio of the distance between the two tubes in the direction perpendicular to the flow), the heat transfer and pressure drop were significantly decreased. Finally, suggestions for the improvement of future works in this field have been provided.
