MIXTURE Multiphase Model, CFD Training Package

Description

MIXTURE Multiphase Model ANSYS Fluent CFD Simulation Training Package, 10 Practical Exercises

This CFD training package is prepared for BEGINNER, INTERMEDIATE, and ADVANCED users of ANSYS Fluent software who are interested in the Mixture Multiphase Model modules, 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.

Heat Exchanger

Heat exchangers must satisfy the characteristics of the overall process of the system. Also, sites should use a durable heat exchanger depending on the environmental conditions. They must be repairable according to working conditions. In project number 1, we simulate a Shell & Tube Heat Exchanger with Helical Fin considering NanoFluid applying multi-phase flow (Mixture method).

In project number 2, we simulate a shell and tube heat exchanger considering a baffle cut. Many materials can be used as nanoparticles. Since the thermal conductivity of materials, whether in the form of metal or non-metallic state Al2O3, CuO, TiO2, SiC, TiC, Ag, Au, Cu, and Fe are generally several times higher, even at a low concentration, which results in an effective heat transfer coefficient.

Evaporation & Condensation

Project number 3 simulates the condensation process inside a shell and tube condenser. A multi-phase 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 4, the evaporation process of a water droplet into the air space is simulated. Therefore, the Multi-phase model simulates the initial phase of air and the secondary phases of water and water vapor. A droplet surface evaporation in the air should be simulated. 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.

Combustion (MIXTURE Multiphase Model)

Scramjets are a type of ramjets that can travel at hypersonic speed while there is no motion device in its engine. Scramjet technology started with the development of the ramjet. The ramjets might not achieve supersonic speed, while scramjets necessarily fly at hypersonic speed. In project number 5, Hypersonic Combustion in a Scramjet engine with Viscous is simulated. The Mach number of inlet air is set to 6, and the temperature of the whole domain equals 300k.

In general, a fuel injector is a system of ducting and nozzles used to direct the flow of a high-pressure fluid so that a lower-pressure fluid is entrained in the jet and carried through a duct to a region of higher pressure. In project number 6, a three-phase flow fuel injector has been simulated. The Mixture multi-phase model for three phases of air, liquid, and vapor has been used to investigate the phase interactions.

Nanofluid

Project number 7 simulates the flow of an Al2O3-water nanofluid into a channel with a heat source. This channel has a square cross-section and has ten categories of obstacles inside. Each of these obstacles has two diagonal plane barriers facing each other and a cylindrical barrier between them. So that the presence of these barriers determines the path of nanofluid flow through the channel. To define the nanofluid, a multi-phase mixture type model is used.

Project number 8 simulates the thermal features of the Battery using a Two-Phase Nanofluid. This simulation is related to a Dual-Potential MSMD (multiscale multidomain) battery model. The present simulation is performed with a Mixture multi-phase model, and the effect of nanofluid flow in heat transfer enhancement of battery is investigated. This work aims to investigate the effectiveness of phase change materials in the cooling process of the battery.

Hydrate Formation

Project number 9 simulates hydrate formation flow inside a tube with a 90-degree elbow. Hydrates are organic substances that contain water. The hydrate in this project combines three different materials of water, water vapor, and methane. Also, between the liquid water phase and water vapor, mass transfer is defined as the evaporation-condensation process.

Turbine (MIXTURE Multiphase Model)

In Project number 10, the effect of the steady rotation of a centrifugal turbine on a water and two-phase air mixture is investigated. The multiphase mixture model is used to solve water and air phase interactions. The secondary phase (air) volume fraction has very low values in the 0.0001 order, which proves the validity of the mixture multiphase model in this project. The secondary phase volume fraction should be less than 15% for applying the Mixture Multi-Phase model. Slip velocity has been considered at the water and air contact interface. The Frame Motion (MRF) model has been applied for the rotation simulation.