Eckert number


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Eckert number

[′ek·ərt ‚nəm·bər]
(physics)
A dimensionless group used in the study of compressible flow around a body, equal to the square of the fluid velocity far from the body divided by the product of the specific heat of the fluid at constant temperature and the difference between the temperatures of the fluid and the body. Symbolized NE . Also known as Dulong number.
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numerical calculations were carried out for different values of angle inclination, Grashof number, Prandtl number, magnetic field parameter M, Eckert number [E.
The influence of Eckert number Ec over dimensionless velocity and temperature profiles are shown in Figs.
The results have been computed for several values of the parameters namely magnetic parameter Ha, velocity ratio parameter , Prandtl number Pr, Eckert number Ec and the non dimensional micropolar parameters C , C and C .
Table 3 and table 4 respectively presents the results for local Nusselt number for Prandtl number and Eckert number.
The effect of viscous dissipation is usually characterized by the Eckert number and has played a very important role in geophysical flow and in nuclear engineering that was studied by Alim et al.
where Ec is the Eckert number, Pr is the Prandtl number, Sc is the Schmidt number, Sr is the Soret number, Du is the Dufour number, M is the Magnetic field parameter, Gr is the thermal Grashof number, Gc is the Solutal Grashof number, k is the porous parameter, [b.
Furthermore, the Eckert number (viscous dissipation parameter) is the measure of the heat produced by friction.
The influences of the magnetic parameter, the thermal radiation parameter, the non-Newtonian Prandtl number and the Eckert number on the velocity, temperature, the local skin-friction coefficient and the local Nusselt number have been studied in detail.
1] are respectively the Prandtl number, Grashof number, Sink strength, Eckert number, Hartmann number, co-efficient of thermal diffusivity and non-Newtonian parameter.
m] is the Grashof number for mass transfer, E is the Eckert number, M is the Hartmann number, P is the Prandtl number, [S.