This paper presents a numerical study of heat transfer through a downstream annulus using water as the working fluid within the laminar flow region. The annulus consisted of an outer twisted square duct and an inner circular pipe. A three-dimensional formulation was used to solve the Navier-Stokes equations numerically for the laminar flow system with a low Reynolds number. ; The results were illustrated as a profile of the thermal enhancement factor, the friction factor and the Nusselt number. The results show that the twisted outer duct of the heat exchanger can create a swirl flow along the length of the heat exchanger. It also caused a boundary layer separation-reattachment on the wall of the inner pipe.
Zielona Góra: Uniwersytet Zielonogórski
IJAME, volume 27, number 2 (2022)
Biblioteka Uniwersytetu Zielonogórskiego
2023-07-06
2023-02-03
72
https://zbc.uz.zgora.pl/publication/77389
Nazwa wydania | Data |
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Numerical study on thermal performance of water flow in a twisted duct heat exchanger | 2023-07-06 |
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