3D simulation of water in a curved pipe using snappyhexmesh in openfoam

Aim : To simulate the flow of water in a curved pipe using snappyhexmesh in openfoam  Geometry in Meshlab : The different .stl files can be viewed in Meshlabs and the identification of refinement zones would become easy . Input data: velocity of water at the pipe inlet = 7m/sec at 25 deg blockMeshDict File : FoamFile…

Aim : To calculate velocity contour and dragforce on a square obstacle placed in the air field and to automate the simulation process in openfoam Geometry : The geometry is created by blockMeshDict file in Openfoam. Input data :  velocity at inlet = 10 m/sec Temperature at inlet = 25 deg c Reynolds number= Re…

            Emission Characterization on a CAT3410 Engine   Aim:  To run the simulation for emission characterization on a CAT3410 Engine. Objective: To run the simulation  for emission characterization on a CAT3410 engine for two different piston profiles (i.e. Open-w,…

Q1. What is the Compression ratio for the engine?  From the Volume vs Crank Angle Plot Here the maximum volume is = 0.0005738 and the minimum volume is =  5.7032 e-5 m^3 And the compression ratio is Maximum Volume / Minimum Volume = 0.0005738 / 5.7032e-5 = 10.06   Q2. Modify the compression ratio for this…

Objective: Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street.   PART 1:  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…

Aim: To perform a combustion simulation on given combustor model and to observe the variation of mass fraction of different species in the simulation. Objective: Part 1 1) Perform a combustion simulation and plot the variation of mass fraction of different species in the simulation using line probe at different location.…

Aim:- To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop using Ansys 2020 R1.   Objective:- To give an outlook about any four empirical models used to calculate the cyclone separator efficiency.  To perform an analysis on a given cyclone separator model…

AIM Parametric Study for a Gate Valve Objectives To perform the parametric study on the gate valve by simulating the opening of gate valve ranging from 10mm to 80mm. To obtain the mass flow rate for each design point. Calculate the flow factor and flow coefficeint for each design point. Introduction The gate valve is the…

Aim - To conduct the Rayleigh Taylor CFD simulation. Introduction  - Rayleigh Taylor Instability (RTI) is a phenomenon that occurs at the interface of fluids of different density wherein the lighter fluid pushes the heavier fluid due to the density difference. It is a dynamic process wherein the system tries…

Conjugate heat transfer (CHT):- Conjugate Heat Transfer (CHT) refers to the coupling of conduction in solids with the conductive and radiative heat transfer in the surrounding fluids. It is used in processes which involves variation of temperature within solids and fluids, due to thermal interaction between solids and…

Aim: 1) To understand the concept of CHT (Conjugate Heat Transfer) analysis and its applications. 2) To perform a CHT analysis (setting up the case, meshing, solving, post-processing). 3) Validation of result.   CHT analysis - Theory      In real life simulations, we need to simulate a practical…

1.INTRODUCTION The Ahmed body is simplified car body used in automotive field to study the impact of the flow pattern on the drag. The external aerodynamics of the car defines many major traits of an automobile like stability, comfort and fuel consumption at high speeds. The flow around the vehicle is characterized by…

Objective To simulate the flow of air through mixing tee and understand the effect of length of pipe and momentum ratio of velocity for mixing of air by using two different types of pipe i.e. short pipe and long pipe. About In industrial process engineering, mixing is a unit operation that involves…

AIM: To set up the Full Hydro simulation case for SI8-PFI Engine model, to find the compression ratio, combustion efficiency, power and torque for this engine and to explain the significance of ca10, ca50 and ca90 Theoritical Background: Port Fuel Injection Port Fuel injection is when fuel is injected prior…

Aim: Simulate conjugate heat transfer for air flowing through an aluminium pipe. 1. Run a grid dependence test for the given problem 2. Analyse the effect of supercycle stage interval on the simulation time   Introduction and Theory: Conjugate Heat Transfer is a process which involves temperature variations in…

The objective of this project is to apply Reynold's decomposition to the Navier-Stokes equation and to determine the expression for Reynold's Stress.  Navier Stokes Equations: The movement of fluid in the physical domain is driven by various properties. For the purpose of bringing the behavior of fluid flow to light…

Aim: To setup and run shock tube simulation in Converge CFD 1. Study the Pressure and Temperature variations due to the shock wave 2. Study how cell count changes due to mixing of two different species. Shock Tube setup and working:        The shock tube is a simple duct closed at both ends. A…

Aim: To simulate the Prandtl Meyer Shock flow in Converge CFD 1. Simulate the supersonic and subsonic flow through a duct having a sharp corner 2. Study the formation of shock waves in the duct 3. Observe the effect of SGS  parameter on shock location and cell count.  Introduction and Theory What is a shock…

Introduction:            The throttle body assembly is a well-known part of the IC engine. The main function of the throttle body assembly is to control the airflow into the engine cylinder based on vehicle demand. It is also known as a butterfly valve. Amount of fluid goes through the butterfly…

Aim: To simulate steady state flow of air over a throttle body 1. Setup and run the simulation 2. Plot the Velocity and Pressure contours 3. Study the results and analyse the flow happening over and around the throttle body   Introduction and Theory: I. Introduction:  In this Project, A Steady state simulation…

Aim: To simulate the flow of air through a backward facing step using Converge CFD 1. Setup and run the simulation for three different grid sizes and compare the results obtained. 2. Plot the Velocity and Pressure contours for the three mesh sizes. 3. Study where and why flow separation is taking place.…

Aim : To simulate the flow of air through a channel using converge CFD by using 3 different grid sizes and comparing the results by generating plots and animations  for velocity and pressure contours. Three different base mesh sizes are  dx= 2e-4 m          dy = 2e-4 m     …

PROBLEM STATEMENT:  To write a Reaction Reduction Mechanism code for the GRI3.0 mechanism,  code should do the following, First, it should run a reference Ignition delay and Max temperature Analysis for the unreduced mechanism for a set of state values (Temperature, Pressure and Equivalence ratio) for a time…

Aim : To find the flame speed using cantera for 1D premixed CH4-air and H2-air combustions. Introduction : Flame speed is the measured rate of expansion of a flame front in a combustion reaction while the autoignition temperature and ignition delay (0-D analysis) can indicate when the reaction will takes place , the flame…

Aim :  To write a code from GRI mechanism for the combustion of methane and to calculate top 10 sensitive reactions wrt to temperature. Introduction : In any particular reaction mechanism there are multiple intermediate reactions happening which affect the rate of entire mechanism. These Reactions depend on different…

Aim : To understand the effect of initial pressure and initial temperature on auto ignition time delay To understand how species concentration is going to vary wrt to time for a particular pressure and temperature Introduction : The fuel air mixture can automatically combust if it attains proper environment to do so. It…

Aim : To understand the reason for unstabilty To figure out which scheme stands stable for larger time steps Theory : A numerical method is said to be unstable if small perturbations cause the solution to oscillate and diverge consider the ODE  `f(y)=(dy)/dx=-1000y-e^(-t)` Here two schemes are considered implicit…

Aim : Solving coupled ODE's using multivariate newton raphson method and by implicit formulation Introduction : In many areas of engineering especially in combustion simulations coupled ODE's are to be solved and solving these equations analytically is not possible so these equations are solved by a numerical integration…

Aim : To calculate the effect of preheating the inlet air on Adiabatic Flame temperature, Cycle efficicency and Fuel savings Theory : The products of combustion having high temperature expand in turbines(energy harvesting unit) and cool down to certain temperature. The efficiency of turbine never reaches 100% so after…

Aim : To use Quantity class in Cantera to perform methane- air combustion Theory : Balanced stoichiometric combustion equation of Methane : Air contains 21% of oxygen and 79% of N2 on volume basis  Mole fraction of O2 = 0.21 Mole fraction of N2 = 0.79 0.21 moles of O2 ----> 0.79moles of N2 1 mole of O2 -------->…

Aim :  1) To calculate Adiabatic flame temperature of a given species in a constant volume combustion chamber 2) To calculate Adiabatic flame temperature of a given species in a constant pressure combustion chamber (considering the effect of product at initial reactant temperature) 3) Examining the effect of bond…

In computational fluid dynamics there are 3 numerical method based solvers to solve the governing navier stokes equation they are  Finite difference method : The grid is linear and aligned so that all the grid points lie in a striaght line and the properties are considered to be concentrated at a single point. Finite …

Aim :  To write a matlab code for symmetry boundary conditions of flow through a pipe To compare results of wedge boundary conditions with symmetric boundary condition Theory : The inputs to the problem are same as the one in wedge boundary condition problem. BlockMeshDict file needs to be updated according to required…

Aim :  To calculate the flow variables To generate the blockMeshDict file using wedge boundary condition. To create a blockMeshDict file using Matlab such that the mesh is automatically generated for any wedge angle To simulate the pipe flow in openfoam using icoFoam solver. postprocess the velocity profile and…

Aim : To simulate the backward facing step and to analyze the solution obtained by using different mesh grading factors. Thoery : The flow through a backward step is solved and analyzed using open foam and inorder to create the geometry 5 blocks are assumed to complete the geometry. This is done so as to capture the…

Aim : To derive the conservative and non conservative forms of governing equation for a 1D supersonic nozzle flow and simulating the flow using Maccormack technique in Matlab. Introduction to 1D supersonic nozzle flow : Considering a steady,isentropic flow through a convergent-divergent nozzle .The flow at the inlet to…

AIM :  To solve steady and unsteady 2D heat conduction equation by using the point Iterative Techniques such as jacobi, Gauss siedel and SOR(Succesive Over Relaxation) using Matlab Initial temperature : Problem statement: Steady state Matlab code : %Solving the steady state equation by using different iterative solvers…

Aim : To simulate Ideal rankine cycle and to generate T-S diagram and H-s diagram based on user inputs using Matlab programming Ideal Rankine Cycle :  Basic Cycle The Rankine cycle is the fundamental operating cycle of all power plants where an operating fluid is continuously evaporated and condensed. The selection…

AIM : To solve the second order Differential equation of a simple pendulum and animating its motion using MATLAB and OCTAVE. The pendulum motion depends up on the newtons second law where it leads to forming the second order ODE.  θ is the Angular displacement in radians.  b is damping factor in (kg/sec)…

  AIM : To parse the NASA thermodynamic data from the data file and to calculate the thermodynamic properties like Specific heat at constant pressure(Cp), Enthalpy (H)and Entropy(S) of various species present in the data file using MATLAB programming. Data File : https://drive.google.com/file/d/1AikCHDlz9s_fu8whE81qee_GD4AyYpCP/view?usp=sharing…

Aim : To find the global maxima of the stalgaite function using Genetic algorithm Stalgamite function :  figure :  Genetic Algorithm : Genetic Algorithms (GAs) are search based algorithms based on the concepts of natural selection and genetics. GAs are a subset of a much larger branch of computation known as Evolutionary…

Aim : To perform curve fitting for given data set and to find best and perfect fit for that particular data set using MATLAB programming Objective : Writing a code to fit a Linear, Quadratic and Cubic polynomial for the Cp data. Plotting the Linear, Quadratic and Cubic polynomial curves along with data points and…

AIM : To calculate Efficiency and to plot a p - v diagram by calculating all the state point variables Figure :  1-2 suction 2-3 Isentropic compression 3-4 Isochoric or constant volume heat addition 4-5 Isentropic expansion 5-6 Isochoric or constant volume heat rejection MATLAB Code : For simplification in analysing…

Aim :  To simulate the Forward Kinematics of a 2R Robotic Arm using MATLAB Program and tracing the Workspace of the End Effector using an Animation. Description :  A Robotic Arm is a programmable Mechanical Arm which may be the sum total of Mechanism or a part of complex shape. The links are connected by joints…