In real engineering problems like heat transfer from cylinder, cylinder head, etc. and fluid flow, a large experimental effort is required for analysis. It is a very time-consuming and expensive process. Computational fluid dynamics is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems involving fluid flows. Computational fluid dynamics analysis is nothing but the simulation process involving heat flow and fluid flow on the basis of computer. The CFD technique is a powerful tool for analyzing industrial and non-industrial applications. Historically, methods were first developed to solve linearized potential equations. Two-dimensional (2D) methods were developed in the 1930s, using conformal transformations of the flow around a cylinder into the flow around an airfoil. The fundamental basis of almost all CFD problems is the Navier-Stokes equations, which define any single-phase fluid flow (gas or liquid, but not both at the same time). CFD analysis is widely used in industries as any industrial process involves heat transfer and fluid handling. flow. Some examples are the following: Industrial applications • Automotive: aerodynamic analysis, heat transfer analysis of IC engines, combustion analysis. • Turbo machinery: fans, compressors, pumps, turbines. • Process industries: combustion, gasification, mixing. • Aerospace: Wind analysis, shape analysis, velocity analysis • Steel industries: tundish performance optimization, ladle gas stirring, etc. • Electrical: cooling of electrical equipment. • HVAC • Nuclear • Marine Fig 3.1 Prediction of the pressure field induced by the intersection of the rotor with the fuselage of the helicopter during forward flight [15]Fig 3.2 Prediction of the temperature distribution...... center of the sheet ...... elocity is obtained from momentum equations. In approaching the pressure base the pressure is extracted from the pressure or pressure correlation equation obtained by manipulating the continuity and momentum equations. In the basic density approach, continuity equations are used to solve the density while the pressure field is derived from the equation of state. In both approaches the finite volume technique is used which consists of: Division of the domain into discrete control volumes using a computational grid.• Integration of governing equations over individual control volumes to construct algebraic equations for discrete dependent variables such as velocity, pressure, temperature and conserve the scalar quantity.• Linearization of the discretized equations and solutions.In the present study; The pressure-based approach was chosen because the airflow in the wind tunnel is incompressible.