| Summary: | The steady, laminar axisymmetric convective heat and mass transfer in boundary layer flow over a vertical thin
cylindrical configuration in the presence of significant surface heat and mass flux is studied theoretically and
numerically. The governing boundary-layer equations for momentum, energy and species conservation are
transformed from a set of partial differential equations in a (x,r) coordinate system to a () system using a group of
similarity transformations. The resulting equations are solved using the Network Simulation Method (NSM) for the
buoyancy-assisted pure free convection and also the pure forced convection cases, wherein the effects of Schmidt
number, Prandtl number and surface mass parameter on velocity, temperature and concentration distributions in the
regime are presented graphically and discussed. For the buoyancy-assisted pure free convection case, nondimensional
velocity (f/) is found to increase with a rise in surface mass transfer (S) but decrease with increasing
Prandtl number (Pr), particularly in the vicinity of the cylinder surface (small radial coordinate, ). Dimensionless
temperature () decreases however with increasing S values from the cylinder surface into the free stream; with
increasing Prandtl number, temperature is strongly reduced, with the most significant decrease at the cylinder surface.
Dimensionless concentration () is decreased continuously throughout the boundary layer regime with an increase in
S; conversely is enhanced for all radial coordinate values with an increase in Prandtl number. For the pure forced
convection case, velocity increases both with dimensionless axial coordinate () and dimensionless radial coordinate
() but decays smoothly with increasing Prandtl number and increasing Schmidt number, from the cylinder surface to
the edge of the boundary layer domain. The model finds applications in industrial metallurgical processes, thermal
energy systems, polymer processing, etc.
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