Table 1: The literature reviews for numerical investigation with using periodic concept.

AuthorsStudied cases TEF

Jedsadaratanachai et al. [5]30° inclined baffle 
Inline, two opposite walls, square channel 
BR = 0.2 
PR = 0.5–2.5 
Re = 100–2000
1.00–9.201.00–21.503.78

Kwankaomeng and Promvonge [9]30° inclined baffle  
One side, square channel 
BR = 0.1–0.5 
PR = 1.0–2.0 
Re = 100–1000
1.00–9.231.09–45.313.10

Promvonge et al. [3]30° inclined baffle 
Inline, two opposite walls, square channel 
BR = 0.1–0.3 
PR = 1.0–2.0 
Re = 100–2000
1.20–11.002.00–54.004.00

Promvonge and Kwankaomeng, [10]45° V-baffle 
Staggered, two opposite walls, AR = 2 channel 
BR = 0.05–0.3 
PR = 1.0 
Re = 100–1200
1.00–11.002.00–90.002.75

Promvonge et al. [2]45° inclined baffle 
Inline-staggered, two opposite walls,  
square channel 
BR = 0.05–0.3 
PR = 1.0 
Re = 100–1000
1.50–8.502.00–70.002.60

Promvonge et al. [4]45° V-baffle 
Inline downstream, two opposite walls, 
square channel 
BR = 0.1–0.3 
PR = 1.0–2.0 
Re = 100–2000
1.00–21.001.10–225.003.80

Boonloi [11]20° V-baffle 
Inline downstream-upstream, two opposite walls, 
square channel 
BR = 0.1–0.3 
PR = 1.0 
Re = 100–2000
1.00–13.001.00–52.004.20

Boonloi and Jedsadaratanachai [12]30° V-baffle 
Downstream, one side, square channel 
BR = 0.1–0.5 
PR = 1.0–2.0 
Re = 100–1200
1.00–14.492.18–313.242.44

Jedsadaratanachai and Boonloi [13]45° discrete-V-baffle 
Downstream, diagonally, square channel 
BR = 0.05–0.20 
PR = 1.0–1.5 
Re = 100–1200
1.40–8.102.50–36.002.50

Jedsadaratanachai and Boonloi [14]Single twisted tape 
y/W = 1.0–6.0 
Re = 100–2000
1.00–10.003.00–44.003.51