Numerically Analyzing A Heat Transmission In Blood Using A Cardioplegia Concentric Tube Heat Exchanger During Open Cardiac Surgery

Abstract

A blood heat exchanger primary objective is to reduce the amount of time a patient's blood needs to cool before open heart surgery. Blood behaves non-Newtonian. Hence, some assumptions have to be made in order to finish the computations. The smoothest surface possible is required for the material in touch. Because blood is brittle, an adequate design must have a low pressure drop and a high heat transfer rate to accommodate the needed quick temperature change. The thermal, dynamic, and pressure drop analyses of a blood heat exchanger will be performed in this work. The goal of blood cooling is to swiftly decrease body temperature, which in turn leads to a reduction in metabolic demands. The heat exchanger water component is set to run at a fixed temperature of 15°C and 0.2 Kg/s flow rate. Blood has a temperature of 37°C and a flow rate that ranges from 0.03 Kg/s. The performance of the blood heat exchanger and the systemic flow rate are the factors that determine the rate of hypothermic induction, regardless of other factors. The numerical analysis's findings can be used in efforts to cause and regulate hypothermia in order to induce it during open cardiac surgery.