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

TI  - IMPACT OF THREE DIFFERENT DOUBLE BAFFLE DESIGNS ON THE  THERMAL PERFORMANCE OF SQUARE DUCTS
T2  - Frontiers in Heat and Mass Transfer

PY  - 2022
VL  - 19
IS  - 1
SN  - 2151-8629

AB  - CFD analyses of flow characteristics and heat transfer topology in a heat exchanger duct (HXD) placed with three various configurations of the double 
V-baffles (DVB) are reported. Parameters of interest are DVB height ratios (b/H = 0.05 – 0.25), gap spacing ratios (g = 0.05 – 0.40), flow directions 
(+x, -x), and DVB configurations (Type I, II and III). Laminar flow with Reynolds numbers (based on the inlet conditions) between 100 – 2000 is 
measured. The present problem is solved with the finite volume method (a commercial program). Fluid flow and heat transfer characteristics in the 
tested duct are described. Thermal assessments of the tested duct are also presented. Simulation results showed that the installation of the DVB in the 
HXD results in higher heat transfer rate due to the creation of the vortex flow and the disturbance of the thermal boundary layer (TBL). Different flow 
structures and heat transfer behavior are observed when gap spacing ratios, flow directions and DVB shapes are changed. In addition, the type II DVB 
provides the highest TEF of 3.55 at b/H = 0.10, g/H = 0.25 for the -x flow direction.
KW  - double V-baffles; heat transfer; thermal performance; flow structures; heat exchanger

DO  - 10.5098/hmt.19.26