Numerical investigations of multiphase pool boiling in micro-channels with several cooling materials
Ali Najim Abdullah Saieed†, Mahmoud A. Mashkour‡, Hasanen Mohammed Hussain‡, Laith Jaafer Habeeb‡†
†Al Rafidain University College, Department of Air-Conditioning and Refrigeration Eng. Tech., Baghdad, Iraq.
‡Mechanical Engineering Department, University of Technology – Iraq, Baghdad, Iraq
‡†Training and Workshop Centre, University of Technology – Iraq, Baghdad, Iraq.
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Substantial care was given to the passive techniques that can improve heat transfer in pool boiling with surface cavities in small size generated by dendrites growing, mechanical machining of grooves. A rectangular model was generated to investigate the boiling process with Ansys Fluent. Two models were created to investigate the boiling. The first model created with fins on its base while the other created with fins on one of its sides. The dimensions of the fins were 0.4 mm height and 0.4 mm width while the distance between each fine and the other was 0.4 mm. Volume of fluid multiphase model was used with several material Ethylene Glycol/water (50%), Propylene Glycol/water (50%), and water. The results shows that the maximum pressure value was calculate for the Propylene Glycol/water (50%) in the vertical and horizontal boiling. Ethylene Glycol/water (50%) gave the highest value for velocity in the vertical boiling whereas the water gave the highest value for velocity in the horizontal boiling.