Abstract
The theory of micropolar fluid has a wide range of applications in fluid mechanics and other related areas, in which coupling between the spin of each particle and microscopic velocity is taken into account. Using this theory many researchers have discussed the dynamics of micropolar fluid. The micropolar fluid flow equations constitute a coupled system of equations and are complicated. The aim of the present work is to study the free convection along a vertical plate heat and mass transfer in micropolar fluid in the presence of double stratification, MHD and suction/injection effects.
Highlights
Fluids treated in the classical theory of fluid mechanics and heat transfer are the ideal fluid and the Newtonian fluid
In order to study the effects of the coupling number K, magnetic field parameter M, suction/injection parameter f_0, thermal stratificaton parameter ε_1 and solutal stratification parameter ε_2 on the physical quantities of the flow
O The higher values of the coupling number K result in lower velocity distribution but higher wall temperature; wall concentration distributions in the boundary layer compared to the Newtonian fluid case
Summary
Fluids treated in the classical theory of fluid mechanics and heat transfer are the ideal fluid and the Newtonian fluid. Experiments on fluids that contain extremely small number of polymeric additives indicated that the skin friction near the rigid surface are about 30% to 50% lower than those without additives [1, 2] Such discrepancies in experimental results and theoretical predictions have been attributed several factors, including surface effects and micro rotational effects of molecules. There exist different approaches to study the mechanics of fluids with a substructure Several theories such as the theory of anistropic fluids [3], the theory of simple micro fluids [4] and polar fluids [5] have been developed to take into account of geometry, deformation and intrinsic motion of individual material particles
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