TY  - EJOU
AU  - Boonloi, Amnart 
AU  - Jedsadaratanachai, Withada 

TI  - INFLUENCE OF RING SIZE AND LOCATION ON FLOW TOPOLOGY,  HEAT TRANSFER STRUCTURE AND THERMAL EFFICIENCY IN HEAT  EXCHANGER SQUARE CHANNEL PLACED WITH 30-DEGREE INCLINED SQUARE RING
T2  - Frontiers in Heat and Mass Transfer

PY  - 2019
VL  - 13
IS  - 1
SN  - 2151-8629

AB  - This paper presents the numerical investigations (finite volume method with SIMPLE algorithm) on flow structure, heat transfer behavior and 
performance assessment in heat exchanger square channel placed with 30o inclined square ring (ISR). The influences of ring size and placement on 
flow and heat transfer characteristics are considered for laminar flow region with the Reynolds number in the range around 100 – 2000. The purpose 
for the insertion of the ISR in the square channel is to induce the vortex flow and also increase the turbulent mixing. The numerical result reveals that 
the ring size and location have effects for the changes of the flow and heat transfer behaviors in the tested section. The present of the ISR in the tested 
section gives the maximum heat transfer rate around 8.13 times above the smooth square channel. In addition, the optimum thermal performance at 
similar pumping power or TEF is around 3.10.
KW  - square ring; heat transfer; thermal performance; numerical study; Nusselt number

DO  - 10.5098/hmt.13.28