Handling Mixture with cantera

Objective: Solving set of ODE equations using multi variate newton raphson method The below are the given equations   As per stiff problem it is better to use implicit backward differencial because the problem solution doesnt gets blown altough the accuracy can effected  J is `J^-1*F` jacoboan matrix with size…

RANS derivation and analysis Content Introduction RANS Derivation Findings   1.Introduction SIGNIFICANCE OF TURBULENCE MODELLING: Turbulence is a type of fluid flow that is unsteady, dissipative (in terms of energy), and diffusive (transport phenomenon) at high Reynolds numbers. Due to those divergences in turbulent…

Objective: Performing analysis to find out the effect of SGS temperature value on cell count in Prandtl Meyer Shock Problem  Performing Steady-state simulation. Steps involved in running 2D Steady-State Simulation Introduction Geometry Creation Boundary flagging Diagnosing the geometry Case Setup Solve Post-processing…

Aim Run PFI simulation with the Engine parameters mentioned above. Answer the question given below 1)The compression ratio of this engine 2)Do we need a wall heat transfer model to predict the wall temperature 3)Combustion efficiency of this engine 4)Determine the power and torque for this engine 5)Significance of ca10,…

Aim: Here we are more concerned about the comparison of the emissions between Open-W and Omega pistons. Here we are comparing with below Nox  Soot UHC(Unburnt Hydrocarbons) Performing Transient Simulation. Steps involved in running Simulation Introduction Geometry Creation Boundary flagging Diagnosing the geometry…

Objective Performing a Shock tube simulation using Converge CFD. Here we are creating two regions namely High-pressure region and Low-pressure regions and with a diaphragm between them and look at different parameters that take place when we remove the diaphragm. What is the significance of this problem? Hereby this we…

Objective: Performing Conjugate heat transfer Transient simulation for a Pipe with Outer diameter of 0.02 and inner diameter of 0.015 leaves with thickness of 0.005.Here we are performing grid dependency test and effect of supercycle state interval Steps involved in running Transient simulation 1)Geomentry Creation 2)Boundary…

Objective: Performing Transient simulation of flow over throttle body. Here we are more concern about pressure velocity and mass flow rates are getting effected due to the rotation of throttle over a time periods which will be disscussed more in the report below.Flow time through elbow data is calculate from steady state…

Objective: Performing Steady state simulation of flow over throttle body Steps involved in running Steady State Simulation 1)Geomentry Creation 2)Boundary flagging 3)Diagnosing the geomentry 4)Case Setup 5)Solve 5)Post processing the results Geomentry Geomentry has import as STL format.Geomentry cleaning such has unnessary…

Objective Setting up 2D Backward Facing Step using converge CFD. Here we are using different mesh sizes to observe the variations of different attributes such as mass flow rate,Pressure,velocity and total cells generated .here we are using mesh sizes of dx=dy=dz=0.0012 dx=dy=dz=0.0009 dx=dy=dz=0.0005 Steps involved in…

Objective Setting up 2D channel flow using converge CFD. Here we are using different mesh sizes to observe the variations of different attributes such as mass flow rate,Pressure,velocity and total cells generated .here we are using mesh sizes of dx=dy=dz=2e-4 dx=dy=dz=1.5e-4 dx=dy=dz=1.0e-4  Steps involved in running…

Objective Performing a parametric study on the gate valve simulation by setting the opening from 10 % to 90%.  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. …

Objective: Here we are performing conjugate heat transfer analysis for graphic card.Here graphic card is divided into three components namely Core,Base and Fins. Core and fins are placed above base. Here core is the source where heat is generated while operating a PC or a computer. Core need to be cooled inorder for PC…

  Geomentry 3D Geomentry 2D Geomentry                    Meshing   Setup General Steady state,Pressure based Model,Axisymmentric Models Energy --> Viscous -->K-Epsilon -->Realizable -->Enhanced wall treatment Multi-phase-->VOF-->Implicit…

Part I CHT Analysis: The analysis type Conjugate heat transfer (CHT) allows the simulation of the heat transfer between Solid and Fluid domains by exchanging thermal energy at the interfaces between them. It requires a multiregion mesh to have a clear definition of the interfaces in the computational domain. Typical examples…

Objective: Perform an analysis on the cyclone separator model for different number of injected particles Part I Four empirical models for the prediction of cyclone collection efficiency, namely 1)Lapple 2)Iozia and Leith 3)Li andWang 4)Koch and Licht 1)Lapple Lapple modelwas developed based on force balance with out considering…

Objective: Explain about the possible types of combustion simulations in FLUENT Plot mass fraction of the different species Part I Possible Types of combustion simulations in FLUENT Based on mixing Non-Premixed combusion(Direct Injection,Late Injection) Premixed Combustion (Carburetor) Partially premixed Based On Phase…

Rayleigh Taylor instability challenge Q1: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? Rayleigh Taylor instability The Rayleigh–Taylor instability, or RT…

i.Ahmed body and its importance The Ahmed body represents a simplified, ground vehicle geometry of a bluff body type.In order to check the new model working in the ansys it is used to cross verify Its shape is simple enough to allow for accurate flow simulation but retains some important practical features relevant to…

Aim: Find the 10 most sensitive reactions out of the first 100 reactions  As per GRI mechanism there are 325 total reactions present in that were finding 10 most sensitive reactions for first 100 reactions So here we need to use some new class to acquire the first 100 reactions from the gri Context: In reaction mechanism…

Objective: Calculate the Auto ignition time for methane for various conditions Part I Here the auto ignition is calculated at varying temperatures and pressure.For every simulation it is common to feed time so here the simulation here is running for 10sec. Auto ingnition temperature can be calculated at T_initial+400 time=10*1000=10000millisec…

So our main objective is to observe what exactly effects the stabilty of the simulation In Numerical analysis there are always two fundamental questions we should consider when solving a problem How sensitive is the solution to the specific form of the problem we are solving How sensitive is the algorithm we use to solve…

Compact Notation Derivation The below are the reactions that are taken to derive notation Reaction Mechanism Let us assaign numbering with a variable index j to the especies so that it would be helpfull in deriving the equations j Species 1 CO2  2  O2 3 CO2  4  O 5 H2O 6 OH 7 H   And numbering…

Question1 Effect of preheating temperature on adaibatic flame temperature The below written is the python code to know how adiabatic flame temperature behaviour change with respect to preheating temperature. Here i considered methane as the fuel and calculates AFT at varying preheating temperatures. import cantera and…

Question1 As we know solution is a class, So Quantity is also a class which add extra funtions to the solution. A.TPX where T is the saturated temperature, P is the pressure in pascal and X is the mole fraction for examples a per code T=298.15K,P=101325pa,X=0.21 of O2 and 0.78 of N2. So here cantera takes the mole fraction…

Objectives calculate AFT vs equivalence ratio at constant volume for methane compare 1st objective results with catera results Constant pressure reactor with heat loss for alkanes,alkene and alkynes constant pressure reactor without heatloss for alkanes with carbon atoms=[1 2 3]   Objective1 In this objective we are…

Note:I shared Drive link where you can find the word document of this literature review

Objective Write separate functions for conservative and non-conservative forms Figure out the minimum number of cycles for which the simulation should be run in order for convergence Compare the normalized mass flow rate between the conservative forms and non-conservative forms - make suitable conclusions Which method…

Aim Create a velocity profile at the 0.085m distance from the inlet domain Number of cells along the x direction= 200(Whole Domain) Number of cells along the y direction = 10(Whole Domain) Use a graded mesh. Grading factor near all walls should be 0.2,0.5 and 0.8 so here we are dealing with three cases of different grading…

So here the both steady and unsteady cases are solved in one matlab main program with help of inducting nine functions by using both implicit and explicit solvers So first the Steady state In steady state the physical properties of the fluid doesn\'t change over a period of time so the inotial equation for the 2D heat…

Computer higher order approximations using skewed and symmetric stencils with 4th order approximations of the second order derivative Central Difference In the very first step we try to calculate the coefficients inorder to calculate the second order derivative with 4th order approximation. Calculting the coefficients…

Parsing NASA thermodynamic data Parsing can refer to breaking up ordinary text.simply we can say that by using parsing we can easily find the alphabet in the the text file. For example we can read a text file we can locate the alphabet so while computing we can get the location of the alphabet . In the very first step…

Genetic Algorithm The genetic algorithm is a method for solving both constrained and unconstrained optimization problems that is based on natural selection, the process that drives biological evolution A typical genetic algorithm requires: a genetic representation of the solution domain, a fitness function to evaluate…

In this program the initial value are taken as below i order to solve the second order differential of a simple pendulem with damping L=1 metre, m=1 kg, b=0.05. g=9.81 m/s2. Simulate the motion between 0-20 sec, for angular displacement=0,angular velocity=3 rad/sec at time t=0 in the first step i used commands to clear…