Heat Transfer Efficiency in Circular Pipes: A Simulation Study on the Effect of Multiple Geometrical Shape Inserts

This numerical study emphasizes on the design of a heat exchanger by employing different geometrical configurations to improve heat transfer efficiency.This simulation employs a k- turbulence model with a constant temperature, by using water as the working fluid, and maintaining a Reynolds number ranging from 5,000 to 25,000.The analysis evaluates the temperature distribution, velocity distribution, pressure distribution, Nusselt number, friction factor, thermal performance evaluation, effectiveness, and vorticity magnitude.The outlet temperatures decrease as the number of inserts increases, with the maximum temperature obtained for twisted inserts for any Reynolds number studied.The highest outlet velocity is obtained without insert and lowest is for a twisted tape insert, indicating a significant reduction due to inserts.The Nusselt number remains fairly constant for all cases, only slightly increasing for the twisted-tape insert.The Performance Evaluation Criterion remains mostly constant across the Reynolds number studied, with higher values obtained for twisted-tape inserts compared to other models.