Mechanical Engineering Training Package, Beginners, Part 2, 10 Exercises
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Mechanical Engineering – ANSYS Fluent Training Package, 10 Practical Exercises for BEGINNER Users (Part 2)
There are 10 practical exercises in this training package by ANSYS Fluent software for Mechanical Engineers. This package presents how to simulate different mechanical devices for all BEGINNER users.
We start this training package with study number 1 which simulates airflow within a supersonic convergent-divergent nozzle and examines the behavior of airflow separation from the nozzle in the surrounding environment. In order to simulate the present model, the pressure condition in the nozzle input section (pressure-inlet condition) and the ambient output sections (pressure-outlet condition) have been used. The nozzle pressure ratio (NPR) is equivalent to the ratio of the inlet air pressure of the nozzle, to the ambient pressure. In practical exercise number 2, the compressible airflow will enter the convergent-divergent nozzle with a pressure of 70 bars and the Mach number of 0.2 with a temperature of 2735 K. After passing the throat zone, the airflow will gain speed and lose its temperature as it passes through the diffuser. The standard k-epsilon model with standard wall function is used to solve fluid flow equations.
In project number 3, an attempt has been made to simulate and analyze the flow of a particle trapping mechanism called the discrete phase trap (TRAPPER). In order to simulate the particles, the discrete phase model (DPM) is activated and Saffman lift force and pressure gradient forces are also applied to particles. Also, since the trapping mechanism mainly works with gravity, gravity has been taken into account.
In practical exercise number 4, a three-phase flow fuel injector has been simulated. The standard k-epsilon model is used for flow analysis. The Mixture multi-phase model for three phases of air, liquid, and vapor has been used to investigate the phase interactions.
Problem number 5 simulates the sound pressure waves absorbed by a plate silencer. To simulate and analyze sound or acoustic waves, the acoustic model has been used in the software. To define the acoustic model in the present simulation, the Ffowcs-Williams & Hawkings model is used.
Practical exercise number 6 simulates the airflow around several generators and the effect of a set of fans on generator room ventilation. In this simulation, a shed is modeled as the location of 30 rows of generators. The open airflow enters the interior of the generator room from the roof of the shed and in front of each of the generator devices.
In project number 7, the transitional motion of a cube containing SLOSHING water and the air is investigated. The interaction of water and air inside the cube is modeled using the Volume of Fluid (VOF) multiphase approach. Cube accelerates in the X direction with an acceleration equal to 5 m/s2, while gravitational acceleration in the –Y direction affects the multiphase entity.
Problem number 8 simulates the heat transfer and cooling of a rotating mechanical device with a semi-cylinder shape. The model rotates around a particular axis (model z-axis) at a speed equivalent to 400 rpm. Therefore, to define this rotational motion in the model, the frame motion (MRF) technique with a rotational speed of 400 rpm has been used.
Practical exercise number 9 simulates hydrodynamic two-phase flow inside a vortex separator. These hydrodynamic vortex separators (HDVS), can separate soluble particles in a fluid from the base fluid. The structure of these devices is such that the flow of the solution entering the system is significantly rotated.
Finally, problem number 10 simulates the effect of cohesion and adhesion on a fluid. In this project, it is assumed that there is a T-shaped computational domain; So that the fluid flow enters from the bottom and exits from the top.
You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.