Discussion: “Viscous Dissipation and Joule Heating Effects on 3D Magnetohydrodynamics Flow of Williamson Nanofluid in a Porous Medium Over a Stretching Surface With Melting Condition” (Tarakaramu, N., Sivakumar, N., Satya Narayana, P. V., and Sivajothi, R., 2022, ASME Open J. Eng., 1, p. 011033)

First Error:

In Eq. (10) in Ref. [1], the term $2υΓ∂u∂z∂2u∂z2$ is wrong because its units are $sec−3/2$ instead of $m/sec2$⁠. The correct form is $2υΓ∂u∂z∂2u∂z2$⁠.

Second Error:

In Eq. (11) in Ref. [1], the term $2υΓ∂v∂z∂2v∂z2$ is wrong because its units are $sec−3/2$ instead of $m/sec2$⁠. The correct form is $2υΓ∂v∂z∂2v∂z2$⁠.

Third Error:

The term $μ0(ρcp)(u′2+v′2)$ in Eq. (12) in Ref. [1] is wrong. The correct form is $μ0(ρcp)((∂u∂y)2+(∂v∂x)2)$⁠.

Fourth Error:

The term $M2(Ecx(f′)2+Ecy(g′)2)$ in Eq. (24) in Ref. [1] is wrong. The correct form is $M(Ecx(f′)2+Ecy(g′)2)$⁠.

Fifth Error:

Equation (18) in Ref. [1] $∂qr∂z=−16σ*T33k*∂T∂z$ is wrong. The correct form is $∂qr∂z=−16σ*T33k*∂2T∂z2$

Sixth Error:

v,x and u,y in Fig. 1 are wrong. The correct forms are u,x and v,y, respectively.

Seventh Error:

In Nomenclature, the units of magnetic field M are $(σ*B02/aρ)$⁠. This is wrong. The correct units are $(σB02/aρ)$⁠.

Eighth Error:

In Nomenclature, the units of specific heat are $(JkgK)$⁠. The correct units are $(J/kg/K)$⁠.

Ninth Error:

In Nomenclature, the dimensionless parameter $Kp=υkp*$ is wrong because it is dimensional with units $sec−1$⁠. The correct form is $Kp=υakp*$⁠.

Tenth Error:

In Nomenclature, the dimensionless parameter $Nb=ζDB(Cw−C∞)α$ is wrong. The correct form is $Nb=ζDB(Cw−C∞)αm$⁠.

Eleventh Error:

In Nomenclature, the dimensionless parameter $Nt=ζDT(Tw−T∞)T∞α$ is wrong. The correct form is $Nt=ζDT(Tw−T∞)T∞αm$⁠.

Twelfth Error:

In Nomenclature, it is written as U_w = stretching velocity along the y-direction. The correct is “along the x-direction.”

Thirteenth Error:

In Nomenclature, it is written as V_w = stretching velocity along the x-direction. The correct is “along the y-direction.”

Fourteenth Error:

In Nomenclature, the definition of radiation parameter $Rd=16σ*T∞23kk*$ is wrong. The correct form is $Rd=16σ*T∞33kk*$⁠.

Fifteenth Error:

In Nomenclature, the dimensionless parameter $Mt=Tf−T∞β+cs(Tm−Ts)$ is wrong because it is dimensional with units $m−2sec2Kelvin$⁠. The correct form is $Mt=cp(Tf−T∞)β+cs(Tm−Ts)$⁠.

Sixteenth Error:

In Nomenclature, it is written σ = Boltzmann constant $(W/m2/K4)$⁠. This is wrong. The correct form is σ = electrical conductivity $(Ω−1m−1)$⁠.

Seventeenth Error:

In Nomenclature, the parameter $αm=kρ$ is wrong. The correct form is $αm=kρcp$⁠.

Eighteenth Error:

In Nomenclature, it is written σ* = electrical conductivity $(m2/s1)$⁠. This is wrong. The correct form is σ* = Stefan–Boltzmann constant $(kg/s3/K4)$⁠.

Nineteenth Error:

In figures in Ref. [1] appear the parameter H, which is unknown. Its definition is $H=Q0(ρcp)a$⁠.

Twentieth Error:

In Conclusions in Ref. [1], it is written “the case of fluid value (Pr = 0.71) when compared to gas value (Pr = 6.2).” The Prandtl number Pr = 6.2 corresponds to water not to gas (air).