CFD Modeling of Hydrodynamic Phenomena and Heat Transfer in Channels of Plate Heat Exchangers – The Latest Observations


The study of hydraulic regime changes in the channels of plate heat exchangers for the manufacture of residential hot water is the focus of this work.

The working circumstances in which the heat exchange process occurs, which are exacerbated by the formation of dirt on the surfaces of the exchanger plates, are of particular importance.

The right approach to handling the challenge of modelling these complicated processes, which is principally represented in the choice of starting boundary conditions inside numerical simulations, is based on their consideration in these shifting situations.

Plate heat exchangers are one of the most efficient forms of small heat exchangers for heat transfer amplification. Because of their small dimensions, low weight and cost, and the decreased area required for installation and maintenance when compared to tubular heat exchangers, they are used in many industrial processes. Heat is transferred in these exchangers by complex-geometry channels generated by two contacting profiled plate heat exchangers. Due to disturbance and impact in the boundary layer, secondary-reverse flow, and swirl to a minor extent, fluid flows in such ducts are unstable. The goal of this research is to compare the operating parameters of plate heat exchangers derived from CFD simulation with the parameters of their operation in real-world settings. The results reveal that in a certain domain of Re numbers (from 8900 to 27650), CFD simulation can accurately forecast the intensity of heat exchange and fluid flow, with a few exceptions, as well as the fluid’s output temperature and pressure decrease. Modeling fluid flow can reveal the shear stress distribution, which is crucial for forecasting contaminated plate heat exchangers.

Author(s) Details:

Dragan Mandic,
JKP Belgrade Power Plants, Savski Nasip 11, Belgrade, Serbia.

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