RANS derivation and analysis

Objective   To make NO HYDRO case set up of an IC engine. Make boundary flagging and complete the whole set up in order to figure out if the Geometry moves correctly during the run. Geometry   Boundary Flagging Piston (Piston Head) Inflow  (Inlet) Marked as Red liner (Marked in Red) Cylinder Head Exhaust…

Questions based on PFI Engine:   Q1. What is the Compression ratio for the engine?    Compression ratio is defined as a ratio of the maximum volume to the minimum volume of the combustion cylinder. in our case compression ratio is `(5.74e^-4)/(5.70e^-5) = 10.07`     Q2. Modify the compression…

Objective   We should simulate 2 types of piston heads: open-W and Omega shape. Our objective is to see how the design of a piston head affects engine performance and emission characteristics.   Creating `60^0` section of the combustion cylinder     To create a section of the combustion…

Objective   we have already created a no-hydro simulation of the PFI case in the challenge "Week 9: Project 1 - Surface preparation and Boundary Flagging (PFI)", now it's time to set up a full-hydro case and see how the combustion occurs in our engine.   Engine parameters     Engine Geometric…

Objective   Simulate flow over a 4 digit airfoil i.e NACA 2412 Airfoil. Drag coefficient Vs Angle of Attack Lift coefficient vs Angle of Attack Compare the effect of turbulence models on the above two results. Make sure that the inlet Reynolds number is 200,000 Make sure you do the above calculations for the…

Objective:   Firstly, completing topology cleanup, afterwards generating surface mesh. Eventually, creating wind tunnel geometry surface meshing and extracting single volume model for further volumetric mesh generation.   Geometry   Figure 1   Topology optimization      Within the…

Objective      To clean the provided cad model of the BMW car, make surface meshing with the surface grouping and sizing per the challenge question. Additionaly, create wind tunnel, therefore volumetric mesh as well.   Geometry                                                   Figure 1   Singlecon detection   Firstly,…

Objective   To simulate airflow over the 2d cylindrical shape object and capture phenomenon called "Vortex Shedding". Our study should be divided in 2 parts:    Part 1:  Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100.    Part 2: 1) Calculate…

Objective   Answer the following questions   Describe Ahmed body and it's importance   Explain the reason for the negative pressure in the wake region.    Explain the significance of the point of separation.       Expected results   Velocity and pressure contours. …

                                                      Volumetric Meshing of a Turbocharger Objective   Resolve all errors in the provided geometry. Create and assign PIDs perform…

Objective   to solve all problems we have i the provided Geometry. Generate Mesh with 3 different Element sizes: 1mm, 3mm and 5mm.   Geometry (With intentional errors)   As you see in The figure above, we have a valve geometry. Our first option is to resolve all the problems which the geomety has…

 Objective    To simulate a turbocharger while pressure ratio has 3 different values: 2Bar 2.5Bar and 3Bar. In addition, while simulating one case increase the simulation time to see how it will affect convergence for the angular velocity of the turbine.   Theory   Turbines have been used for centuries…

Objective   To simulate and understand working principle of a mixing tree. Run grid dependence test to choose the mesh grid size for further study. In the provided report we will cover 2 cases:    Case1: Short mixing tree with a hot inlet velocity of 3m/s. Momentum ratio between hot and cold inlets…

  Objective     To simulate Conjugate heat transfer in a solid aluminum pipe. Run grid dependence test to see how it affects simulation results. Understand how the Super-cycle modeling works and realize importance of the nondimensional term Y+.    Intoduction     In this challenge…

                                                                    Winkl Hoffer Nozzle    Objective    to simulate Winkl Hoffer nozzle…

Purpose    To simulate roots type supercharger with 4 different boundary conditions at the outlet (Array of the pressure ratio = [1.1 1.5 2 2.2]Bar). To get supercharger performance data (Total pressure ratio vs mass flow rate). Furthermore, see the importance of the total energy solver.   Theory …

Objective   To simulate proportional valve, run 6 cases: 3mm, 4mm and 5mm lift sizes with and without Adaptive Mesh Refinement (AMR), make a plot ilustrating pressure force along Z and lift dependance.   Theory   Proportional valve is a valve which relies on the statics to supply reduced pressure to an output…

   Intoduction     Main goal of this project is to simulate centrifugal pump with 3 different values of massflow rate and figure out how it affects pump's performance, in other words, if and how it will change the pressure head and the efficiency.    Thoery    Centrifugal pump…

                                                                            SHOCK TUBE  Introduction   Main goal of…

Introduction   In this challenge we are setting up a simulation to capture expansion shock wave, when supersonic flow turns around a convex corner.      In our case we have a domain, in which we set inlet velocity as a 680m/s when the temperature is 286.1K, meaning that we have Mach = 2 at the…

 1) Introduction    We know that Navier-stokes equations could be used in any fluid flow applications to effectively approximate the results, but when we encounter turbulent flows we need mesh elements with tiny dimensions, for instance in IC engines largest turbulent length scales equal to small values…

   In this Challenge I\'m setting up a transient flow of the Throttle body.  SET UP from the steady state simulation we already know inflow velocity in the elbow shape pipe. According to the plots red colored plot shows that average inflow velocity is approximately 190m/s. Now we can roughtly calculate how…

   Problem Intorduction     In this challenge i\'m simulating the flow over a throttle body, my case is steady state and the throttle body in the elbow shape pipe is fully opened.  SET UP   we have air as a fluid in our domain, As an initial conditions at the Inlet boundary we have 1.5Bar…

   In this challenge we are simulating Channel flow, in which we have inlet at which we set Total (Stable) pressure to be 100001Pa and 100000Pa at the Outlet.Airflow is incompressible in our case. According to thermodynamics because of pressure difference fluid flow will accure from Inlet towards Outlet, so my…

1) MESH 1.1) 2e-3m mesh  1.2) 1.5e-3m mesh 1.3) 1e-3m mesh In the pictures above is shown the difference between 3 base mesh sizes 2) pressure and velocity contours (animations) 2.1) animation of velocity contours mesh size 1e-3m 2.2) animation of pressure contours mesh size 1e-3m 2.3) animation of velocity contours…

For deriviing 4th order approximation of second-order derivative i use 3 types of approximation: central, skewed right-side and skewed left-side methods.   1) central differencing is a method when we are getting information from both side of node to get accurate derivative for example in my case if i want to calculate…