Week 8 - Simulation of a backward facing step in OpenFOAM

Objective:- For the given Hood model, Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria.S. No Quality Criteria Value 1Target/Average length  52Minimum Length 23Maximum Length 74Aspect 35Warpage156Skewness457Jacobian 0.78Minimum…

Objective:- For the given model, check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria. Target lengths for the different parts of a model can be decided by your own. Finer mesh will give good results and will compromise with the…

Objective:- For the given model, check and solve all geometrical errors on half portion and Assign appropriate PIDs. Perform meshing with the given Target length and element Quality criteria. After meshing the half model, Do symmetry to the other side.Target lengths for the different parts of a model are as follow:Body…

Objective:- For the given models, check for the geometrical errors and delete surfaces which are unwanted for Surface wrap as shown in the videos. After clearing geometry, Merge all 3 models and perform surface wrap. Target length for Wrap = 3 mmProcedure:- Load all the three models in ANSAENGINETRANSMISSIONGEAR BOXDeleting…

Objective:- For the given model, check for the geometrical errors to make appropriate volumes. Create and assign PIDs as shown in the video. 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…

Objective:- For the given model, check for the geometrical errors and perform Topology clean up accordingly. Set three different target lengths as three different cases and mesh the model.  Target length = 1mm, 3 mm and 5 mm (i.e. 3 cases) Element type = Tria Apply any one target length from the above at a time for…

Objective:- Part I 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. You need to plot for CO2, H2O, CH4, N2, O2, NOx emissions & Soot formation.  Part II…

Aim:- Performing a parametric study on the gate valve simulation by setting the opening from 10 % to 80%.    Objective:- 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…

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:- Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. You can use appropriate materials of your choice for the simulation. Make sure to properly define the correct solid and fluid zones. Refer the video for further clarification and the model is provided below the video. Run…

Objectives:- 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:   Give a brief description of why and where a CHT analysis is used. Maintain the y+ value according to the turbulence model and justify the results.  Calculate the wall/surface heat transfer coefficient on the internal solid surface & show the velocity & temperature contours in appropriate…

Objective:- For this challenge, you will have to provide answers to the following questions: Q1. Describe Ahmed's body and its importance. Q2. Explain the reason for the negative pressure in the wake region.  Q3. Explain the significance of the point of separation.  Expected Results: Velocity and pressure contours. …

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

Objective:- 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 for the first case and based on your judgment use the more suitable model for further cases. Giving the reason for choosing…

Aim:- Validation studies of symmetry boundary Condition vs Wedge boundary condition vs Analytical H.P equation Objective:- Validate Hydro-dynamic length with the numerical result Validate the fully developed flow velocity profile with its analytical profile Validate maximum velocity and pressured drop for fully developed…

Objective:- Write code in Matlab to automate the generation of blockMeshDict file. The code should take inputs like pipe length, diameter, wedge angle, etc and output a fully functional blockMeshDict file.  Validate Hydro-dynamic length with the numerical result Validate the fully developed flow velocity profile with…

Finite Volume Method   Finite volume method (FVM), like FEM, is based on an unstructured (e.g. triangular) mesh. Therefore, it is suitable for irregular and complex geometries. FVM has another advantage over FEM for fluid mechanic problems. So far, the numerical methods that we presented have been based on PDEs.…

Aim:- To simulate an incompressible-laminar-viscous flow through backward facing step geometry Objective:- 1) Simulate the flow without using any grading factor (i.e., GF = 1) 2) Simulate the flow with grading factor of 0.2. The cells should be finer near the walls ( including the step wall ). Measure the velocity profile…

Objective:- Solving the conservative and non-conservative forms of the governing equations through MacCormack method and comparing the results Studying the variation of mass flow rate inside the nozzle at different time steps   Theory:- A nozzle is a device designed to control the direction or characteristics…

Objective:- 1. Steady state analysis & Transient State Analysis Solve the 2D heat conduction equation by using the point iterative techniques that were taught in the class. The Boundary conditions for the problem are as follows; Top Boundary = 600 K Bottom Boundary = 900 K Left Boundary = 400 K Right Boundary = 800…

Objective:- To create the mid surface of the component by satisfying the given criteria Follow the below-mentioned quality criteria, mesh the component given below and assign thickness: Target Element Length = 5 Units S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper …

Derive the following 4th order approximations of the second-order derivative.  Central difference Skewed right-sided difference Skewed left-sided difference After deriving these schemes, prove that your skewed schemes are fourth-order accurate i.e the thumb rule given in HINT (ii).  Once you have done this,…

Mesh the Given component with the Size of 5 Units. Create 1D elements on the following component with given cross-section and DOF Rod element:- Translational DOF should be Constrained with RBE2 link Cross-Section: BOX- Dimension a= 12 mm                        …

Objective:- For a 10 cell series lithium ion battery model, simulate the thermal effects and compare life cycle performance at various temperatures, charge & discharge rates using MATLAB. Simulink Model:-   Explaination:- Temperature Source Constant source of thermal energy, characterized by temperature. Here…

Battery pack capacity: 18 kWh Cell: ANR26650M1-B  Prepare a detailed battery pack drawing along with its enclosure. State your assumptions.   Solution:-   Cell used:-   ANR26650M1-B      Battery Specifications:-     Assumption:- Assuming the Voltage required by the vehicle to…

1.Simulate the 3 test cases from harness dashboard and write a detailed report on the results   Selecting the First Test Sequence   Result:- After running the Simulation for about 20000 seconds we observe the following things Cell Voltage:- The Cell Voltages fluctuated in the time Interval of 0-3000 sec as the…

1. Prepare a table which includes materials & chemical reactions occurring at the anode and cathode of LCO, LMO, NCA, NMC, LFP and LTO type of lithium ion cells. Give your detailed explanation on it   Solution:-   A battery is made up of an anode, cathode, separator, electrolyte, and two current collectors…

Objectives:-  Create a detailed MATLAB model of an electric rickshaw (three wheel passenger vehicle) as per details below:  Rear wheels driven by PM brushed type motor Assume efficiency points of motor controller and motor Make an excel sheet of all input and assumed data  Results: For any three standard…

1. Search and list out the total weight of various types of aircrafts Solution:-   MTOW = Maximum take-off weight, MLW = Maximum landing weight, TOR = Take-off run, LR = Landing run Type MTOW [kg] MLW [tonnes] TOR [m] LR [m] ICAO category FAA category Antonov An-225 640,000 591.7 3500   Heavy Super Scaled…

1. For a defined driving cycle, calculate the energy required for braking. Solution:- During Braking of a Vehicle, the Kinetic Energy possessed by the vehicle gets dissipated in the form of Heat. The total Kinetic energy lost can be calculated as follows `K.E = ½ * M * DeltaV` Where, M = Total mass of the vehicle…

Run MATLAB demo ‘Speed control of a DC motor using BJT H-bridge’. Modify the model such that armature current doesn’t shoot up when motor changes direction from forward to reverse.  SOLUTION:- The H-bridge is a simple network where the current flows in both the direction through the motor when the…

Which types of power converter circuits are employed in electric and hybrid electric vehicle?    Solution:- Types of power converters are as follows The device which converts AC current to DC current is known as Rectifier. In plug-in type of electric vehicle the battery receives AC current from the source.…

What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?  Mapped model :- This Model uses a set of Data’s to calculate Engine performance. The Data’s include mostly ‘Lookup tables’ for calculation of all the parameters inside the…

INTRODUCTION:- ADVISOR, NREL’s ADvanced VehIcle SimulatOR, is a set of model, data, and script text files for use with Matlab and Simulink.  It is designed for rapid analysis of the performance and fuel economy of conventional, electric, and hybrid vehicles.  ADVISOR also provides a backbone for the…

AIM:- Carry out a system-level simulation of an all-terrain vehicle.  Prepare a technical report explaining the model properties & comments on the results. THEORY:- An all-terrain vehicle (ATV), also known as a quad, as defined by the American National Standards Institute (ANSI) is a vehicle…

AIM:- Implement control logic of a “washing machine” using Stateflow as per given sequence:  If the power supply is available, the system gets activated  If the Water supply is not available, stop the process & indicate through LED Soaking time should be 200s followed by Washing time of 100s.…

AIM Make a Simulink model of Doorbell using solenoid block with the following details:   In the above arrangement, when the switch is closed the electromagnet receives electrical power from the battery and pulls the metal arm to hit the bell producing sound.  Create a situation where the switch is closed…

AIM:- Creating a Rankine Cycle Simulator using MATLAB. The code should calculate the state points of the Rankine Cycle based on user inputs.  Then, plotting the corresponding T-s and h-s plots for the given set of inputs. The presentation of your code will be taken into consideration while grading. Attaching a report…

AIM:- Write a code in MATLAB to optimise the stalagmite function and find the global maxima of the function. OBJECTIVE:- Clearly expalin the concept of genetic algorithm in your own words and also explain the syntax for ga in MATLAB in your report. Make sure that your code gives the same output, even…

AIM:- 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. You will be reading this file NASA thermodynamic data THEORY:- NASA  came up with polynomials that can be used to evaluate thermodynamic properties such as Cp,…

AIM:- To solve a second order differential equation using MATLAB INTRODUCTION:- Solving a second order differential equation by breaking down into a set of first order differential equation in MATLAB EQUATION:- `(d^2theta)/dt^2 + b/m*(d theta)/dt +g/l*sintheta = 0` Where, g = gravity L = length of the string in ‘m’…

AIM:-  To write a MATLAB program for simulating an Air standard Otto cycle and calculating its efficiency OBJECTIVE:- To plot a P-V graph in MATLAB To calculate the Thermal efficiency of the cycle INTRODUCTION:- An Otto cycle is an idealized Thermodynamic cycle that describes the functioning of a typical…