Volume of Fluid (VOF), Package for Advanced, Part 1
This CFD training package is prepared for ADVANCED users of ANSYS Fluent software in the Multi-phase Volume Of Fluid (VOF) area, including 10 practical exercises.
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Multi-phase Volume Of Fluid (VOF) CFD Simulation Package, ANSYS Fluent Training for ADVANCED Users
This CFD training package is prepared for ADVANCED users of ANSYS Fluent software in the Multi-phase Volume Of Fluid (VOF) area, including 10 practical exercises. You will learn and obtain comprehensive training on how to simulate projects. The achieved knowledge will enable you to choose the most appropriate modeling approaches and methods for applications and CFD simulations.
In project number 1, the two-phase flow of water and air inside an open channel is investigated. Multiphase VOF model using an open channel setting is activated to simulate two phases of water and air inside the channel. The water enters the channel with a mass flow rate of approximately 60Kg/s and its interaction with the air phase inside the channel is simulated.
Project number 2 simulates a two-phase flow (water and air) inside an open channel with a 180-degree arc. The multi-phase VOF model (Volume of Fluid) has been used; Because this two-phase flow is considered free surface currents. Therefore, the VOF model defines different phases of the flow. The open channel flow model has been used because the free surface of water flows inside the canal.
In project number 3, the flow inside a wide-edge spillway is investigated. It should be pointed out that there is an elevation difference between the main and sub-channel for reasons like storing a portion of flowing water. A multi-phase Volume of Fluid (VOF) model is activated to simulate two water and air phases inside the open channel.
In project number 4, a Numerical simulation of pollution of the Stagnant river has been done. The VOF model is used to simulate the phases. Pollutant enters the river from a nonuniform profile somewhere in the middle of the river, and it diffuses into the water. Due to its density which is lower than water density, it floats on the free surface of the river.
In project number 5, a numerical simulation of pollution of the Meandering river has been done. The VOF model has been used to simulate and solve the two-phase flow field equations. Pollutant enters the river from two circular inlet profiles somewhere at the beginning of the river, and it diffuses into the water. Due to its density which is lower than water density, pollutants cause the river’s surface to be polluted, and because of the water flow, pollution moves along the river.
In project number 6, Ansys Fluent software has been used to simulate the sloshing of a tanker truck. The Volume of Fluid (VOF) model has been used to simulate and solve the two-phase flow field equations. The primary phase is air and, the secondary phase is water. The truck brakes at the speed of 15 m/s, and after 3 seconds, it stops. This means that the water inside the tanker feels the brake deceleration in addition to gravity acceleration.
Wave (Volume of Fluid)
In project number 7, a numerical simulation of the short wave in the sea has been done. The purpose of this project is to investigate the ability to simulate short waves with First-Order Airy theory in Fluent software and the VOF model with the open channel wave bc has
Project number 8 was performed to simulate aircraft washing. The computational domain of a cube with dimensions of 46 x 8.5 x 17, in which a separate part is provided to move the sub-domain of the aircraft using the sliding mesh model. Water enters the computational domain through holes in the bottom of the slope at a speed of 15 meters per second and air in the opposite direction of the plane at a speed of 2 meters per second from the opposite side to model more realistic conditions
The water wheel is an example of Pelton turbine. Most water wheels are mounted vertically on a horizontal axis and mounted horizontally on a vertical shaft. The wheels are perpendicular to certain parts of the turbine due to reduced friction force and increased nozzle thrust. The other part of the turbine is out of water. Therefore, the wheels rotate around their axis in two different phases water and air. In project number 9, The turbine’s diameter is 0.7 m and the boundary of the free surface is 0.2 m below the center of the water wheel. Water velocity is considered 3 to 5 m/s depending on the average river velocity.
Mixing (Volume of Fluid)
Project number 10 simulates mixing two substances in a rectangular tank, including carbon dioxide and ethanol. The VOF multiphase model has been used to simulate the present model. The input flow enters the tank from the lower part with a temperature of 300 K. The inlet flow pressure is variable and time-dependent. For this purpose, the pressure inlet boundary condition at the input boundary is used, with a UDF in the form 8000000 + 66666.666 * t. This simulation process was performed in 180 s with a time step of 0.5 s.
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