Simulation of a backward facing step in OpenFOAM

Objective:  Check for the geometrical errors to make appropriate volumes. Create and assign PIDs as shown. Perform surface mesh with the given target lengths as per PIDs. Blade stage-1 = 1 mm Blade stage-2 = 1 mm Impeller = 2 mm Shaft rotor = 1 mm Turbo casing = 5 mm Compressor casing = 5 mm Inlet casing cover = 5 mm Perform…

Objective: Check for the geometrical errors and perform Topology cleanup accordingly. Set three different target lengths as 1mm,3mm and 5mm three different cases and mesh the model.  Given model: Procedure: Open the geometry, in topo mode go to check options, and check for geometry check. Enable all checks and…

Objective: To carry out CHT Analysis on the Exhaust port Give a brief description of why and where a CHT analysis is used. Conjugate Heat Transfer(CHT): The Conjugate Heat Transfer (CHT) analysis type allows for the simulation of heat transfer between solid and fluid domains by exchanging thermal energy at the interference…

Objective: To carry out an External flow simulation over an Ahmed body. Q1. Describe Ahmed's body and its importance. Answer: Ahmed's body The Ahmed body is a 3D model that is representative of a standard passenger car. It is a research model in order to do experimental analysis and validate it with researched data. It…

Objective: Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street.    PART-I Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100.  PART-II Calculate the coefficient of drag and lift over a cylinder by setting the Reynolds number…

Objective:  Simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle. Solution:  The Governing Continuity, Energy, and Momentum equations for the quasi-1D steady, isentropic flow can be expressed as; Continuity: `rho_1 V_1A_1=rho_2V_2A_2` Energy: `h_1+V_1/2=h_2+V_2/2` Momentum: `P_1A_1+rho_1V_1^2A_1+int…

Objective: Solve the 2D heat conduction equation by using the point iterative techniques  Solution:  The Boundary conditions for the problem are as follows; Top Boundary = 600 K Bottom Boundary = 900 K Left Boundary = 400 K Right Boundary = 800 K absolute error criteria = 1e-4  Implementing the following…

Objective:  Creating a Rankine cycle simulator & calculating the state points based on user input's.  Plotting the corresponding T-S and H-S plot. Theory:  Rankine cycle is the theoretical cycle on which steam turbine works.Rankine cycle is the process widely used by power plants such as coal fired…

Objective:   Write a function that extracts the 14 co-efficients and calculates the enthalpy, entropy and specific heats for all the species in the data file.For this I will be reading the file NASA thermodynamic data. Calculate the molecular weight of each species and display it in the command window.…

Objective:  To simulate an axisymmetric laminar flow by applying the wedge boundary condition. Validate your results with the Hagen- Poiseuille's equations for the fully developed flow. Theory: In nonideal fluid dynamics, the Hagen–Poiseuille equation, also known as the Hagen–Poiseuille law, Poiseuille…

Objective:  To simulate an axisymmetric laminar flow by applying the Symmetry and wedge boundary condition for the mentioned angles i.e; `10^0` `25^0` `45^0` and validate your results with the Hagen- Poiseuille's equations for the fully developed flow. Theory: In nonideal fluid dynamics, the Hagen–Poiseuille…

Objective:  For this challenge, we have created two versions of the mixing tee. One of them is longer than the other. The first job is to set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 360C & the Cold inlet is at 190C.  Use the k-epsilon and k-omega SST model…

Finite Volume Method(FVM): The Finite volume method(FVM) is a method for representing and evaluating partial differential equations in form of algebraic equations. In this method, volume integrates into a partial differential equation that contains a divergence term and is converted into surface integrals, using the divergence…

Objective:  To simulate an incompressible-laminar-viscous flow through the backward-facing step geometry and perform a transient simulation. Case 1 - Simulate the flow without using any grading factor (i.e., GF = 1) Case 2 - Simulate the flow with a grading factor of 0.2. The cells should be finer near…

Objective:  Write a code in MATLAB to optimise the stalagmite function and find the Global maxima of the function. Theory: Genetic Algorithm (GA) is a search-based optimization technique based on the principles of Genetics and Natural Selection. It is frequently used to find optimal or near-optimal…

Objective:  Write a program in Matlab to evaluate the second-order derivative of the analytical function exp(x)*cos(x) and compare it with the 3 numerical approximations that you have derived. Theory:  1.Skewed right-sided difference:   f(i) f'(i)*Δ(x) f''(i)*Δ(x)^2 f'''(i)Δ(x)^3…