Mass Transfer – ANSYS Fluent Training Package, 10 Practical Exercises for ADVANCED Users

Description

Mass Transfer ANSYS Fluent CFD Simulation Training Package for ADVANCED Users

This training package includes 10 practical Mass Transfer exercises using ANSYS Fluent software. MR CFD suggests this package for ADVANCED users familiar with elementary Mass Transfer theories and simulation and wants to become professionals.

Cavitation

The cavitation phenomenon is one of the phenomena in that vapor bubbles are formed in the part of the fluid whose pressure is low. Sometimes there is a misconception that the only reason for this phenomenon to occur and the formation of steam bubbles is because the liquid pressure reaches the vapor pressure (P_v). However, various other factors and parameters cause this phenomenon to occur. In project number 1, the fluid flow of water and the cavitation phenomenon around an INDUCER inside a pipe is simulated.

Project number 2 simulates the cavitation phenomenon inside a radial flow PUMP. This pump is of the centrifugal pump (radial flow) type; In this way, the desired fluid enters it parallel to the central axis and exits it radially or perpendicular to the inlet path. Also, the multiphase VOF model is used.

In project number 3, which has been done by the CFD numerical simulation method, cavitation has been simulated in a cross-flow TURBINE. Unlike most turbines where the flow is axial or radial, the fluid flows crosswise. This project has been done in three main parts. In the first case, which is without airfoil, but in the second case, to prevent cavitation, an airfoil is placed at the Entrance, and in the third case, the airfoil angle compared to the second case is 15 degrees in a clockwise direction.

Sprays

Air freshener is one of the tools in home decoration that has a stunning effect to stylish and modernize the house. The restroom is one of the essential parts of a home. So to be able always to have a clean restroom, we suggest that you have a quality air freshener so that you always have a clean and fragrant restroom. Project number 4 investigates the spraying of Air fresheners in the restroom by the Two-way DPM method.

In project number 5, we use two types of continuous and discrete phases. The hot airflow, responsible for evaporating the moisture contained in the solution, enters the spray dryer chamber as a continuous phase and flows into the chamber (Eulerian). At the same time, a solution containing water and solid particles (Lagrangian) injects into the chamber as a discrete phase. The main purpose of this simulation is to investigate the behavior of particles that flow as a discrete phase in a continuous flow.

In project number 6, which has been done by CFD numerical simulation method, The spray drying chamber is simulated by the two-way DPM & Species Transport model. The particle diameter is 1 mm, and the flow moves at a speed of 1 m/s.

Condensation (Mass Transfer)

Project number 7 simulates the process of condensation inside a steam ejector. When the Wet Steam multiphase model is used, two sets of transport equations are solved: the mass fraction of the condensed liquid phase and the number or concentration of droplets per unit volume. This phase change model involves forming liquid droplets during a homogeneous non-equilibrium condensation process based on the classical non-isothermal nucleation theory. According to the continuity equation, the ejector structure is in the form of a convergent-divergent tube which, by entering the driving fluid into it and passing through the converging part of the nozzle, causes the velocity of the passing fluid to increase by reducing the cross-sectional area of ​​the flow.

Boiling

In project number 8, the difference between HRIC, compressive, Geo-reconstruct models and their effect on the output results were discussed by changing the volume fraction discretization. The computational domain is a 15 x 15 cm cube with a 2 x 2 cm heated surface. The change in volume fraction discretization showed no significant difference in surface temperature and heat transfer coefficient. The Geo-Reconstruct model visually models a more realistic simulation with a higher computational cost.

Heat pipe

A HEAT PIPE is a heat transfer device that transfers heat between two solid contacts via mass transfer. A typical heat pipe is a sealed pipe or tube composed of a suitable material with the working fluid, such as copper for water heat pipes or aluminum for ammonia heat pipes. In project number 9, the heat pipe problem was simulated. The project was analyzed using the multiphase VOF model and activating the mass transfer of evaporation and condensation. A hot wall with a temperature of 400 K and a cold surface with a temperature of 300 K was assumed.

Rice Dryer (Mass Transfer)

When rice is harvested, it contains 20-30% moisture which can corrupt the grains in the shortest time. Therefore, drying the grains after harvesting is important before storage and sending them to the rice mill. In project number 10, a rice drying device has simulated using the Two-way Discrete Phase Model (DPM) & Species Transport Model, and then the results were investigated. Hot air enters the drying device, and then 120000 rice grains with 10% moisture are injected randomly for 6 seconds.

You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.