Marangoni boundary layer flow over a permeable surface in the presence of thermal radiation
Marangoni convection is a flow induced by the surface tension gradients associated with either thermal or concentration gradients. In this study, the problem of Marangoni boundary layer is derived in three different types of fluid over a permeable surface, where there is suction or injection effe...
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| Format: | Thesis |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/67712/1/FS%202017%2087%20IR.pdf |
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| Summary: | Marangoni convection is a flow induced by the surface tension gradients associated
with either thermal or concentration gradients. In this study, the problem of
Marangoni boundary layer is derived in three different types of fluid over a
permeable surface, where there is suction or injection effect. The scope of this thesis
is restricted to two dimensional, steady, incompressible and laminar flow considered
in micropolar fluid, nanofluid and viscous fluid. Each problem is considered in
different type of fluid with respect to the parameters interest. The effect of thermal
radiation is considered due to its vast applications and large contribution in the field
of science and technology and it is occurring in the heat equations. The consumption
of suction or injection effect is also utilized to determine the effect of it on the flow
and heat transfer characteristics. The governing nonlinear partial differential
equations are transformed into a system of nonlinear ordinary differential equations
using similarity transformation. Then the resulting systems of equations are solved
numerically. Numerical results are presented in tables and graphs for the velocity,
temperature and concentration profiles are analysed with respect to the involved
parameter interest namely types of concentration (weak and strong), radiation,
magnetic field and suction or injection parameter. Comparisons with known results
from the previous literature have been made in order to ratify the numerical results
obtained in this thesis and the injunction showing very good agreements. All the
governing parameters affect the flow and heat transfer characteristics of the fluid
except for the radiation parameter. It only affects the heat transfer rate of the fluid as
it decreases the flow rate. While the suction gave a decrement to the heat transfer
and injection proposed an opposite results. |
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