Sherwood number


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Sherwood number

[′shər‚wu̇d ‚nəm·bər]
(physics)
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For practical applications, the corresponding physical quantities of interest are the skin friction coefficient [C.sub.f], the dimensionless wall couple stress [M.sub.w], the local Nusselt number [Nu.sub.x] and the local Sherwood number [Sh.sub.x], which are defined as:
In addition to analytical description of deposition efficiency by dimensionless parameter Pr and [K.sub.th], thermophoretic Sherwood number, [Sh.sub.th] was factored in an analytical model [7].
For a two-phase flow consideration, dimensionless numbers are used: Sherwood number as a representative of the mass transfer and Reynolds number as a representative of the flow hydrodynamics.
The important physical parameters for the type of boundary layer flow under consideration are the skin-friction coefficient, Nusselt number, and Sherwood number. From the velocity field, the shearing stress at the surface can be obtained, which in the nondimensional form (skin-friction coefficient) in the x- and y-directions using (10) is given by
Sherwood Number. The nondimensional Sherwood number Sh = -([partial derivative][phi]/[partial derivative]R)[|.sub.R=1] is obtained from the concentration profile (12) as
Figures 8(a)-8(c) show that the local Sherwood number increases on increasing the chemical reaction, radiation, and slip parameters.
The skin friction, Nusselt number, and Sherwood number are important physical parameters for this type of boundary layer flow and are given by
Exact analytical approximations are obtained for the velocity, temperature, and concentration profile as well as for the local skin friction coefficients, the local Nusselt number, and the local Sherwood number by means of the OHAM technique [28].
The mass transfer coefficient was obtained from Sherwood number [7, 20, 21] as:
The quantities of physical interest for this problem are the local skin friction coefficient [C.sub.f], the local Nusselt number [Nu.sub.x], and the local Sherwood number [Sh.sub.x], which are, respectively, defined as [35]
The skin friction and heat and mass transfer coefficients are described by the local skin friction coefficient, Nusselt number Nu, and the Sherwood number Sh defined as
The effect of velocity, temperature, concentration, local as well as average skinfriction, and Nusselt number and Sherwood number are studied for different parameters during transient and steady-state period.