Energy equation of swirling flow in a cylindrical container. (November 2019)

• Record Type: Journal Article
• Authors: Yusof, Siti Nurul Akmal; Asako, Yutaka; Faghri, Mohammad; Tan, Lit Ken; Sidik, Nor Azwadi Bin Che; Japar, Wan Mohd Arif Bin Aziz
• Is Part Of: International communications in heat and mass transfer. Volume 108(2019:Nov.)
• Publication Date: 2019-11
• Subjects: Energy equation -- Viscous dissipation term -- Energy conversion -- Cylindrical container -- Irreversible processes; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Heat -- Transmission; Mass transfer; Periodicals; 621.4022
• DOI: 10.1016/j.icheatmasstransfer.2019.104288
• Languages: English
• ISSNs: 0735-1933

Abstract

Abstract: The energy equation which includes the substantial derivative of pressure and the viscous dissipation terms was solved numerically to verify whether it can correctly calculate the energy conversion from kinetic to thermal energy in an irreversible process. The fluid temperature was obtained for a swirling flow in a cylindrical container with a constant initial angular velocity. The fluid in the container came to a halt after a short time because of the viscosity. The kinetic energy of the fluid was converted into thermal energy which resulted in an increase of the fluid temperature. The governing equations were discretized using the control volume based power-law scheme of Patankar and the discretized equations were solved by using a line-by-line method. The results showed that the kinetic energy at its initial state was converted into thermal energy with a conversion rate of 99.4%.