TY - GEN A1 - Rashed, Musaab K. A1 - Jehhef, Kadhum Audaa A1 - Badawy, Faris Ali A2 - Jurczak, Paweł - red. PB - Zielona Góra: Uniwersytet Zielonogórski N2 - 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. N2 - 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. L1 - http://zbc.uz.zgora.pl/repozytorium/Content/69278/10354-Volume27_Issue2_13_paper.pdf L2 - http://zbc.uz.zgora.pl/repozytorium/Content/69278 KW - mixed convection KW - twisted square duct KW - heat exchanger KW - laminar flow T1 - Numerical study on thermal performance of water flow in a twisted duct heat exchanger UR - http://zbc.uz.zgora.pl/repozytorium/dlibra/docmetadata?id=69278 ER -