Week 8 - Simulation of a backward facing step in OpenFOAM

Objective: A furnace is used to burn Methane and Air Mixture. A recuperator is connected to this furnace to recover some energy. What is the effect of preheating on the adiabatic flame temperature by changing pre-heating from 298 to 600K. Does preheating help with fuel saving? How does combustion efficiency go up…

Objective : To derive the reaction rate of ODEs & production rate of each species for the given simple reaction mechanism  Reaction Mechanism : CO+ O2 ⇌ CO2 + O O + H2O ⇌ OH + OH CO + OH ⇌ CO2 + H H + O2 ⇌ OH + O For determining the rate of reaction , we need to compute forward and backward…

Objectve : To solve the given coupled non linear system of equations using mulltivariate newton raphson method. Theory The given set of differential equations are as follows: The above differential equations using backward differencing scheme can be written as: Writing the above equations in the form of root finding problem…

Objective : To work with the Quantity class of Cantera to create various mixtures and to explain how the mixture calculations are performed. 1. Use the "moles" method/function of the A object and explain how it was calculated. Solution is a class and quantity is also a class which adds extra function to the solution.…

Objective To calculate adiabatic flame temperature for different cases in python and cantera. Adiabatic flame temperature (AFT) In the study of combustion, there are two types of adiabatic flame temperature depending on how the process is completed: the constant volume and constant pressure.…

Objective : To perform a steady-state conjugate heat transfer analysis on a model of a graphics card. To use appropriate materials for the simulation and making sure to properly define the correct solid and fluid zones. To run the simulation by varying the velocity from 1m/sec to 5m/sec for at least 3 velocities and…

Objective To perform a combustion simulation on the combustor model and plot the variation of the mass fraction of the different species in the simulation using line probes at different locations of the combustor. Plots are needed for CO2, H2O, CH4, N2, O2, NOx emissions & Soot formation. In second part, the water…

Objective To perform a parametric study on the gate valve simulation by setting the opening from 10 % to 80%.  Obtain the mass flow rates at the outlet for each design point. Calculate the flow coefficient and flow factor for each opening and plot the graph. Discuss the results of the mass flow rate and flow coefficient. …

Aim:- To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop.   Objective:- To write a few words about any four empirical models used to calculate the cyclone separator efficiency.  To perform an analysis on a given cyclone separator model by varying the particle…

Objective What are some practical CFD models that have been based on the mathematical analysis of Rayleigh Taylor waves? In your own words, explain how these mathematical models have been adapted for CFD calculations. Perform the Rayleigh Taylor instability simulation for 2 different mesh sizes with the base mesh being…

Objectives: Description of why and where a CHT analysis is used. Maintain the y+ value according to the turbulence model and justify the results.  Calculating the wall/surface heat transfer coefficient on the internal solid surface & showing the velocity & temperature contours in appropriate areas. How would…

Objective :  To run the simulation of Ahmed body for the velocity of 25 m/sec with the default air properties in fluent. In this challenge, answers to the following questions needs to be provided Q1. Describe Ahmed's body and its importance. Q2. Explain the reason for the negative pressure in the wake region. …

Objective : To simulate the flow over a cylinder and understanding the phenomenon of Von Karman vortex street. To simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100. To calculate the coefficient of drag and lift over a cylinder by setting the Reynolds number to 10,100,1000,10000…

Objective :To set up steady-state simulations for both shorter and longer mixing tee and to compare the mixing effectiveness when hot inlet temperature is 360C & the Cold inlet is at 190C.  Case 1  Short mixing tee with a hot inlet velocity of 3m/s. Momentum ratio of 2, 4.  Case 2  Long mixing tee…

Objective : To simulate an incompressible-laminar-viscous flow through the backward facing step geometry using icoFoam solver. The domain specifications are as per the following figure   Conditions Mesh specification Number of cells along the x direction (longer dimension) = 200 Number of cells along the longer…

Objective : To simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle. To derive both the conservation and non-conservation forms of the governing equations and solve them using the Maccormack's technique and to determine the steady-state temperature distribution for the flow-field variables and…

Objective : To solve the 2D heat conduction equation for steady state analysis & transient state snalysis by using the point iterative techniques .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. For solving implicit…