Moving Mesh (Mesh Motion) – ANSYS Fluent Training Package, 10 Practical Exercises for BEGINNERS

Description

Moving Mesh (Mesh Motion) ANSYS Fluent CFD Simulation Training Package for BEGINNER Users

This training package includes 10 practical Moving Mesh exercises using ANSYS Fluent software. MR CFD suggests this package for BEGINNER users who tends to learn the simulation process of Moving Mesh problems without any strong background.

Derrieus Wind Turbine

Vertical Axis Wind Turbine (VAWT) is becoming ever more important in wind power generation thanks to its adaptability for domestic installations. However, it is known that VAWTs have lower efficiency, above all, if compared to HAWTs. Project number 1 is going to simulate an airflow field close to a vertical axis Darrieus wind turbine. The geometry included a rotary zone for the turbine walls and a stationary zone for the rest of the domain. The inlet is considered to wind at 1 m/s, and the turbine zone is rotating at 120 RPM.

In project number 2, steady airflow in the presence of an H-type wind turbine is. The H-type turbine analyzed in the present work has six blades where three blades are closer to the center of rotation. The turbine rotates in Z-direction with an angular velocity equal to 14.17 rad/s. Air velocity at the inlet is equal to 5.3 m/s. Airflow in the domain is dominantly affected by turbine rotation.

Project number 3 is going to simulate an airflow field close to a vertical axis Helical wind turbine. The geometry included a rotary zone for the turbine walls and a stationary zone for the rest of the domain. The inlet is considered to wind at 1 m/s, and the turbine zone is rotating at 120 RPM. This paper aims to investigate the behavior of airflow and pressure distribution and study drag force.

Project number 4 compares the airflow passing over two H-type Darrieus wind turbines of Plain and Serrated airfoils. In this project, the airflow enters the computational domain with a velocity of 7m/s, and we apply the RNG k-epsilon model to solve the turbulent flow equations. Also, it should be noted that the Mesh Motion option was enabled to simulate the rotating motion of turbine blades, and the rotation velocity of the rotating domain was set to 2.8285 rad/s.

Savonius Wind Turbine

The two most well-known types of these turbines are Savonius and Darrieus. The movement mechanism of the Savonius turbine is based on drag force, while the movement mechanism of the Darrieus turbine is based on lift force.

In project number 5, a two-dimensional two-blade Savonius wind turbine has simulated using moving mesh, and then the results were investigated. Air enters the computational domain from the inlet with 10m/s velocity while the turbine rotates with a constant angular velocity of 10rpm. Our final goal is to illustrate the pressure and velocity distribution and animate the fluid motion. On the other hand, the three-dimensional Savories wind turbine is simulated in project number 6. Air enters the fluid domain from the inlet with 10m/s velocity while the turbine rotates with a constant angular velocity of 40rpm. Our final goal is to illustrate the pressure and velocity distribution and animate the fluid motion behind the turbine.

Pumps (Moving Mesh)

Project number 7 simulates the pumping of highly viscous fluid (i.e., Glycerin). The twin-screw pump increases the pressure of the Glycerin and pushes it toward the outlet. The RNG k-epsilon model is exploited to solve the turbulent flow equations. The rotation velocity of the rotating domains was set to 3 rad/s. A twin-screw pump is a positive displacement pump, meaning that the pump transfers a particular volume of product according to the speed and pitch of the screws.

In project number 8, a ram pump has been simulated. In this simulation, a Mesh Motion model with an angular velocity of 1 radian per second has been used, and the input speed has Water is one m/s, and at the outlet, water is discharged at atmospheric pressure.

Helicopter

In project number 9, the rotation of helicopter wings is simulated in transient time formulation, and the results including net upward force, wingtip speed, and Tip Speed Ratio (TSR) are investigated. In order to generate upward movement in aerodynamic applications, movement of a certain amount of air in a downward direction is needed, which in return generates upward motion. For helicopters, this movement of air is done using a propeller which consists of 2 or more wing-shaped geometries, rotating around a center. In this simulation, the propeller is rotating with an angular velocity equal to 1250 rpm in Y-direction.

Bioreactor

Project number 10 simulates fluid mixing in a Bioreactor with a Rushton turbine. Bioreactors are equipment and systems in which biochemical reactions occur and are used in various industries, including pharmaceutical, food, biochemical, perfumery, etc. The stirrer used inside this reactor is a Rushton-type turbine. Rushton turbines are in the form of radial flow type impellers widely used in mixing applications in engineering processes. The value of rotational speed in this region is equal to 143 rpm and is defined around the model’s vertical central axis (Y-axis).

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