Simulation of Heat Transfer in a Tubular Pipe Using Different Twisted Tape Inserts

Abstract

This paper performs a simulation study of the heat transfer phenomena in a tubular U-loop pipe. We have investigated the enhancement of heat transfer with mass flow in a pipe without insert, with full length and short length twisted tape inserts. The length of the pipe is approximately 2436.80 mm long with 29 mm inner and 33 mm outer diameter respectively. A constant heat flux is taken which generated the boundary layer of the pipe close to the flowing fluid around the boundary. The simulations are considered for the stationary and the time dependent module for 35 seconds with different length of inserts. The comparisons are made among the results. We observed that the transfer of heat is enhanced significantly with the increase of the length of inserts inside the computational domain. We also found that, full length twisted tape inserts are more effective than comparing with the short length inserts and without insert.

Application of Passive Technique to Cocoa Beans Batch Dryer and Assessment of Thin Layer Models

“…TT is a commonly employed technique for improving heat exchange. The TT inserts can increase heat transfer by blocking the flow and partitioning the flow [9][10][11][12][13]. The blockage causes an increased pressure loss but leads to the secondary flow because of the swirl flow or vortex inside HEX tubes, which creates fluid mixing, reduces the thickness of the boundary layer [14,15], and increases residence time [5].…”