The present discussion concerns some doubtful results included in the above paper.

In the discussed paper, the damping parameter E3 and the radiation parameter Rn are defined as follows (Eq. (32) in Ref. [1]): 
E3=d3dμ˙λ3
(1)
 
Rn=16σ*T033kKμ˙cp
(2)

where d is the channel half-width, d is the coefficient of viscous damping, μ˙ is the fluid dynamic viscosity, λ is the wavelength, σ* is the Stefan–Boltzmann coefficient, T0 is a reference temperature, k is the absorption coefficient, K is the fluid thermal conductivity, and cp is the specific heat.

The coefficient of viscous damping d is included in the following equation (Eq. (21) in Ref. [1]): 
[−...

Reference

Reference
1.
Hayat
,
T.
,
Ayub
,
S.
,
Tanveer
,
A.
, and
Alsaedi
,
A.
,
2018
, “
Slip and Joule Heating Effects on Peristaltic Transport in an Inclined Channel
,”
ASME J. Therm. Sci. Eng. Appl.
,
10
(
3
), p.
031004
.
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