Investigation of Boiling Heat Transfer and Flow Regimes in a Heat Exchanger

• Published in: Applied Mechanics and Materials Vol. 660; no. Advances in Mechanical, Materials and Manufacturing Engineering; pp. 679 - 683
• Main Authors: Jamil, Muhammad Adib, Sadikin, Azmahani, Isa, Norasikin Mat
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 31.10.2014
• Subjects: Annular flow; Bundles; Computer simulation; Fluxes; Heat transfer; Mass flow rate; Mathematical models; Tubes; CFD; Flow Pattern; Heat Exchanger; Boiling
• ISBN: 3038352780; 9783038352785
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.660.679

Experimental and numerical simulation of heat transfer and flow regimes for vertical flow across horizontal tubes are presented for mass flow rate in the range 0.03 – 0.17 kg/s and heat fluxes in the range 1.07–1.35 kW/m2. The tubes had a diameter of 9.75 mm and a pitch to diameter ratio of 1.85. The CFX version 14.0 from ANSYS was used to predict the flow regimes and the temperature distribution in the tube bundles. These data and the predictions from numerical simulation were compared with the data available in the literature. It is found that the circulation zone in the shell becomes bigger as the mass flow rate is increases. The flow patterns identified in this experiment are bubbly, intermittent and annular flow. These data agrees well with the published data.