Analysis of Film Condensation in Horizontal Microchannels with Various Channel Shapes using ANSYS

  • Mu’ammal Ashshiddiqi Universiti Tun Hussein Onn Malaysia
  • Azwan Sapit Universiti Tun Hussein Onn Malaysia
Keywords: Microchannel; Film Condensation; Simulation; R-134a; Channel shapes

Abstract

The film condensation of refrigerant R-134a in circular (diameter 1 mm), triangular (side 1 mm), inverted triangular (side 1 mm), square (side 0.5, 1, 2, 3, 5 mm), rectangular (sides 1x1.5 and 1.5x1 mm) are numerically studied through ANSYS Fluent 16.1. The effect of channel shape is investigated where the wall temperature is uniform with velocity inlet of vapor 3 ms-1 and vapor inlet temperature at 90oC. The results showed that The film thickness is grow gradually in 0-100 mm from inlet and then has not much change along 200 mm – outlet. Although the film thickness is generated in every microchannel and even the film generated is almost equally (except square wist side 5 mm), the square channel come out with higher heat transfer coefficient than other channel shapes. 

Published
2019-03-20