Week 3 - External flow simulation over an Ahmed body.

Aim -  To simulate the motion of the air moving from a centrifugal turbomachine. In this approach the moving mesh approach in transient simulation is used. 1) Then we go to open the general tab and set the transient 2d planar simulation. 2) The turbulencxe model is selected as the k-epsilon realizable model. 3) Then…

#) Approaches for moving zones- 1) Circular kind of interface is used and the NS equation is solved separately as well. Data is transferred from one frame to the other through the interface . The approaches are- 1) Area average- The physical quantity is found out by averaging over the whole area of the domain. 2) Mass…

Aim - To simulate the flow inside the CD or convergent divergent nozzle using the inlet and outlet pressure condition given. Theory - The CD nozzle is a device that is used to accelerate the high pressure flows coming from the combustion chamber or reservoir to high velocity or supersonic flow if there is a favourable…

#) Objective - To set up the simulation over the NACA 0012 airfoil . That is a symmetrical airfoil.  To find out the drag coefficient vs the angle of attack . The lift coefficient vs the angle of attack . Compare the effect of turbulence odels on the above results . The inlet Reynolds number is of 2 * 10^5   …

AIM of the project -  Geometrical clean up of the Tesla car and then we have to do the geometrical clean up of the model. Then we have to import the geometry that is being provided so it looks like this-   #) Next we have to remove the half portion of the truck to work on the inside part of it-  we use the…

AIM of the project -  For the given model check for the geometrical errors and delete surfaces that are unwanted for Surface wrap as shown in the videos. After clearing geometry, Merge all 3 models and perform surface wrap.   #) Objective of the project - Target length for the wrap = 3 mm . The smoothing…

Aim of the project - Clean up the given geometry of the BMW car so that no single cons are present and the only necessary triple cons should be there and there should be only double cons. #) Procedure-   Clean up the geometry till there is no topological error. Assigning relevant PIDs. Surface meshing. Perform symmetry.…

Aim of the project - To eliminate the topological errors that are acquired in the given a turbocharger CAD model and then perform the surface and the volumetric with the different mesh length that is given in the problem. Before going to do the we had to do the following operations- 1)  #) Turbocharger-  A turbocharger (abbreviated T or T/C),…

AIM of the project - For the given model, check for the geometrical errors and perform Topology cleanup accordingly. Set three different target lengths as three different cases and mesh the model.  #) Introduction about Ansa- 1) ANSA is a computer-aided tool for finite element analysis and CFD analysis widely…

#) Objective of the project -1) To simulate the process of combustion on a model using the fuel and air. 2) Plot the variation of mass fraction of different species in the simulation using line probes at the different locations of the model. 1) Introduction of combustion- Combustion, or burning, is a high-temperature…

gate valve - Definition and theory-  gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. The gate faces can…

AIM of the project- To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop. Theory of the cyclone separator- Cyclonic separation is a technique of removing particulates from the air, gas, and liquid stream without the use of filters through vortex separation. When removing…

Aim- To perform a steady state conjugate heat transfer analysis on a model of graphics card. Select an appropriate material for simulation. Mesh the geometry with a desirable combination and explain the mesh setting used on this model. Simulate the result by varying bthe velocity of v = 1m/sec to v = 5 m/sec. Find…

Aim - To conduct the RT CFD simulation  Introduction- RTI is a phenomenon that occurs on the interface of fluids of different density wherein the lighter fluids push the heavier fluid due to the density difference. It is a dynamic process wherein the system tries to reduce its combined potential energy. Theory - Initially…

AIM of the project- To perform the steady-state conjugate heat transfer simulation on the exhaust port when the air is coming at the inlet at a speed of 5m/sec. The objective of the project is to mainly focus on the following- 1)       #) Definition of the Conjugate heat transfer analysis- Conjugate heat…

#) Objective of the project- Run the simulation for the flow of velocity = 25 m/sec with the default air properties in fluent. Importance of the Ahmed body-  The Ahmed body is a generic car body it is a bluff body (a simplified vehicle model) to study the external aerodynamics. The airflow around the Ahmed body captures…

AIM- To simulate the laminar flow over the cylinder and simu8late the phenomena of vortex shredding and calculate the  Strouhaul number of the flow. By varying the Reynold number from 10 to 10000 we can see how the drag coefficient changes due to this effect. Theory of the flow- As flow over a cylinder is one of the…

AIM- To simulate the mixing of the cold and the hot air in the tee and the mixing will get the desired quantities. To give different velocities of the cold air and the length of the tee is varied to find ou the value of the temperature of the resultant mixed air. Introduction- The functioning of the mixing tee is to provide…

AIM-  To simulate the isentropic flow through a  quasi 1 - D subsonic nozzle by deriving both the conservation and nonconservation form of the governing equation and solve them by implementing te Macormack method in the MATLAB . Problem statement- Determine the steady -state temperature distribution for the flow…

Definition of the finite volume method(FVM)- It is a method for representing and evaluating the partial differential differencing in the form of algebraic equations. In the FVM volume integrals in a partial differential equation that contains a divergence term are converted to surface integrals using the divergence theorem.…

AIM- To solve a 2D heat conduction equation over a flat plate where the boundary conditions are being given. We are going to separately code for the the steady and the unsteady parts of the two-dimensional heat conduction equation. The partial differential equation that defines the entire physics of the 2-D heat conduction…

Aim - Deriving the 4th order approximation of a second-order derivative using the Taylor table method. The different methods of approximations that have been taken into account in this project are as follows. 1) Central difference scheme in this method is the values of two points from both sides of the reference point…

AIM of the project -  To write a program to code the stalagmite function and to write another code by the help of genetic algorithm(ga), that is inbuilt inside the Matlab to find out the global maxima and global minima of the stalagmite function . Objectives of the program-  1) To write a code in Matlab to optimize…

AIM_ To write a code in Matlab to parse the data of the NASA thermodynamic properties of the various gases species and evaluate the thermodynamic properties such as cp, H, and S, and also document the coefficients that are required to evaluate these polynomials for 1000+ species. Explanation about parsing-  In a computer…

AIM- To write down a code in Matlab to simulate the way the pendulum oscillates.Solving the ordinary differential equation. Which would yield the result of the motion of the ball of the pendulum. Finally to create one animation of the motion so that the motion can be visualized.  Explanation- 1)ODES are the ordinary…

Aim- To create one animation of the robotic arm movement in Matlab by a code.  Methodology- To animate the rotation o the robotic arm we have to use the for loop in which we can rotate the arm from 0 to 90 degrees for both the first part of the arm and the second part of the arm.  #) For loop- For loop is a control…