Abstract:
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The aim of the current work is to simulate the laminar flow over square cylinder by developing
numerical code using C++ programing language. The findings of this simulation are
streamlines and isotherm pattern and global quantities like; lift force coefficient, Drag force
coefficient, recirculation length, and Nusselt number. Flow over square cylinder is an important
research topic in many engineering fields due to its numerous applications such as building
aerodynamics, cooling of electronic component and compact heat exchangers. The thesis is
divided into 6 chapters. The objectives and scope of the work is explained in chapter1. In
chapter 2, the governing equation and the assumption used to simplify these equations are
discussed. Discretization of the domain and the governing equation will be carried out in
chapter 3. In chapter 4, the algorithm for pressure velocity coupling (fractional step Method),
linear solver used for solving system of linear equations and different boundary conditions are
discussed. The developed numerical code is verified in chapter 5 using Method of
Manufactured Solution (MMS) and comparing code solution to high accurate Benchmark
solution of the Driven cavity and differential heated square cavity. Finally in chapter 6, the
simulation of laminar flow over square cylinder is explained, in which the effect of Reynolds
number and effect of blockage ratio are investigated. Also tandem arrangement for two square
cylinder and effect of adding gravity term using Boussinesq approximation for this
arrangement are studied. It is concluded that, flow patterns, drag, lift coefficient, and strouhal
number are affected by changing Reynolds number and blockage number. In case of tandem
arrangement, downstream cylinder has different drag, lift, and Nusselt number from upstream
cylinder. Moreover adding buoyancy affect different calculated parameter especially lift
coefficient. |