Mass Transfer – ANSYS Fluent Training Package, 10 Practical Exercises for BEGINNER Users
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Mass Transfer ANSYS Fluent CFD Simulation Training Package for BEGINNER Users
This training package includes 10 practical Mass Transfer exercises using ANSYS Fluent software. MR CFD suggests this package for BEGINNER users who tends to learn the simulation process of Mass Transfer problems without any strong background.
One of the thermal methods of water desalination is the use of solar desalination units. Solar energy is used as a heat source in solar water desalination and causes evaporation.
Project number 1 investigates the performance of a solar still thermal desalination unit. The present model consists of a small chamber with a sloping glass surface at the top and is modeled in 2-dimensional. The solar heat passes through the glass to the water’s surface in the enclosure and causes surface evaporation (applying a UDF for surface evaporation). On the other hand, Project number 2 consists of a small chamber with a sloping glass surface at the top and modeled 3-dimensional.
The main mechanism used in desalination plants is to evaporate the saltwater and then distill the water vapor. In project number 3, the surface evaporation process in a 2D solar desalination system is simulated. In this process, the surface of the liquid water will receive the warmth of solar rays. Then, based on the principles of surface evaporation, the water molecules on the water’s surface will start to evaporate. A UDF was used to determine the mass transfer method. The VOF multiphase model for three phases of air, water vapor, and water fluid has investigated the phase interactions.
Project number 4 investigates the performance of a step solar desalination unit. The present model consists of a small chamber with a sloping glass surface on both sides and steps within it, where saline water flows on the surface of these steps. Solar Radiation heat transfer passes through the glass to the water’s surface in the enclosure to evaporate the water surface on the step walls. In fact, the simulation focuses solely on the amount of distilled water in the system, and the purpose of the present study is to investigate the amount of distilled water on the cold surface of the sloping glass plate. Radiation is also used to create surface evaporation on the running water on the stair walls.
Condensation & Evaporation
Project number 5 simulates the condensation process inside a shell and tube condenser. The condensation process means the conversion of a fluid from a gaseous phase to a liquid phase; This means that when the fluid vapor reaches a saturation temperature, it turns into a liquid. The heat that causes a phase change between a liquid and a gas is called latent heat. A multiphase Mixture model is used; Because the two phases of liquid water and water vapor are thoroughly mixed together. Also, a Mass Transfer in the form of evaporation-condensation must be defined to define the condensation.
In project number 6, the evaporation process of a water droplet into the air space is simulated. Therefore, the Multiphase model simulates the initial phase of air and the secondary phases of water and water vapor. The simulation aims to investigate the droplet behavior during the falling and the amount of vapor produced in the air due to the water surface evaporation.
Boiling (Mass Transfer)
Project number 7 simulates the boiling process inside a nanotube. A nanotube is a tube that is made at the nano-scale by nano-particles. The Eulerian model is used. The water stream enters the pipe at a speed of 1e-5 and a temperature of 373.15 K, and since this water stream is close to the saturation temperature, it can be said that it is ready for the boiling process.
Project number 8 simulates the water flow in a water jet. A water jet is a tool for creating a high-pressure water flow for use in operations such as cutting or cleaning surfaces of objects. Since there is a possibility of pressure drop in this model, the Cavitation phenomenon has been investigated in this model; Because this phenomenon occurs when the fluid pressure drops to its vapor pressure. Therefore, the model of two-phase VOF flow and mass transfer between two phases of water and water vapor is defined as cavitation at a vapor pressure equal to 3540 Pascal. The aim of the present work is to investigate the changes in the volume fraction of water and water vapor phases.
Project number 9 simulates hydrate formation flow inside a tube with a 90-degree elbow. Hydrates are organic substances that contain water. Hydrates are formed by adding water. The hydrate in this project is a combination of three different materials of water, water vapor, and methane. Therefore, to define this hydrated material, the multiphase mixture model is used. Also, between the liquid water phase and water vapor, mass transfer is defined as the evaporation-condensation process.
Multicomponent particles (Mass Transfer)
In project number 10, the Multicomponent particle type for Droplet Evaporation has been investigated. We used the one-way DPM to simulate the discrete phase.
You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.