Solving a Combustion Simulation for a Sector

In this tutorial a complete Direct injection (DI) compression ignition (CI) engine geometry is transformed into 60° sector in-order to reduce mesh size and solution time. Detailed boundary conditions are as shown in the  Figure 3.1: Problem Schematic (p. 107). Sector simulation is started at intake valve Closing (IVC) with initial conditions as 3.45 bar and 404 K, species mass fraction of O2=0.1369, N2=0.7473, CO2=0.0789,H2O=0.0369. n-heptane (nc7h16) is used as surrogate for diesel fuel and is injected 8 degrees before compression ( T op Dead Center). Engine rpm is increased from 1500 rpm to 2000 rpm and its effect...

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Solving a Port Flow Simulation in IC Engine

In this tutorial of port flow analysis, you will measure mass and angular momentum flux (swirl and tumble) for given cylinder head and intake port design over varying valve lifts of 2mm, 6mm and 10mm. You will create swirl monitor planes at 30 mm, 45 mm, and 60 mm below the cylinder head. The inlet, outlet and wall boundary conditions are as shown in the  Figure Problem Schematic. Initial conditions are pressure 101325 Pa and temperature 300 K. The tutorial illustrates the following steps in setting up and solving a port flow simulation of an IC engine. • Launch...

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Solving a Cold Flow Simulation in IC Engine

A three dimensional single cylinder CFD simulation of a 4-stroke engine is performed under motored conditions (cold flow) in this tutorial. Detailed boundary conditions are shown in  Figure 1.1: Problem Schematic(p. 1). Engine simulation is started from Intake valve opening (IVO) followed by air flow during intake stroke. Air is compressed as piston moves towards top dead center ( TDC). This is followed by expansion of air as piston moves towards bottom Dead center (BDC). This tutorial ser ves as an intro-duction in releasing the streamlined workflow between pre-processing, solver and post processing while carrying out simulations with Fluent....

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Rigid Body FSI of a Moored Vessel

This workshop utilities the 6 degrees-of-freedom rigid body solver  in CFX The rigid body solver will be used to simulate the movement of a  model-scale hull, moored within a water testing tank A homogeneous multi phase approach is taken to simulate the free surface A moving wall condition will be applied to generate some wave patterns and fluid-structure  interaction with the hull Overview The computational domain is rectangular and half-symmetric The hull is positioned to give sufficient space both fore and aft (for wave and wake generation) and in the beam direction The domain is open at the stern...

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Missile Silo Launch Simulation by Fluent

Introduction The purpose of this tutorial is to provide guidelines to set up and run a dynamic mesh (DM) case using the layering scheme. The tutorial models a missile being launched from a silo. The motion of the missile is predicted using the six degree of freedom (6DOF) solver in FLUENT. In this tutorial, you will learn how to: Read a mesh file and perform a dynamic mesh calculation. Enable and configure the 6DOF solver. Compile a UDF that governs the missile motion. Set up moving zones. Set up a dynamic mesh event to control the mesh motion. Define...

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Projectile Moving Inside a Barrel

Introduction The purpose of this tutorial is to illustrate how to set up and solve a problem using the following two features in FLUENT. Moving Deforming Mesh (MDM) using the layering algorithm. User-defined real gas law. The problem involves a projectile moving through a barrel and out of the muzzle. The flow is assumed to be inviscid. In this tutorial you will learn how to: Read a mesh file for performing an MDM calculation. Compile a UDF for the projectile motion and the Abel-Nobel real gas law. Set up the moving zones and hook the UDF in FLUENT. Run...

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