Asterios Pantokratoras

School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece

Abstract Some errors exist in the above paper.

The momentum equation (2) in [1] is as follows

First error

The units of concentration C are kg m−3(Nomenclature)whereas the pure number 1 is dimensionless.In Physics it is not allowed to add quantities with different units and the term(1 -C∞)is wrong.

Second error

In the term(T-T∞)λappears the parameterλwhich is dimensionless.However equation (1) is dimensional and this is irrational.

Third error

From figure 1 in[1]it is seen that gravity is present.However there is no gravity term in equation (1).

Fourth error

The mixed convection parameter is defined as follows in [1]

The units of concentration C are kg m−3(Nomenclature)whereas the pure number 1 is dimensionless.Therefore the term(1 -C∞)is wrong and the equation (2) is wrong.

Fifth error

For the same reason the buoyancy ratio parameter in [1]is wrong.In addition the appearance of dimensionless heat generation parameterβin equation (3) is irrational.

Sixth error

The dimensionless Brownian parameter is defined as follows in [1]

Seventh error

In the energy equation (3) in [1] appears the term

Eighth error

Equation (5) in [1] and the above figure 1 in [1] appears the equation