Dynamic Mesh ANSYS Fluent Training Package

Description

Dynamic Mesh ANSYS Fluent CFD Simulation Training Package, 10 Practical Exercises

Dynamic Mesh ANSYS Fluent Training Package is prepared for BEGINNER, INTERMEDIATE, and ADVANCED users of ANSYS Fluent software interested in the Dynamic Mesh module, including 10 practical CFD Simulation 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.

Watery applications

In project number 1, the moving of a cubic Robot in water is simulated. The water enters the inlet boundary with a velocity of 1.5m/s, while the robot moves towards this boundary with a velocity of 3m/s. The dynamic mesh model is activated, and smoothing and remeshing options are enabled. It should also be mentioned that the robot’s motion is applied to it via a PROFILE.

Project number 2 simulates a spherical ball’s behavior in water using the Dynamic Mesh & FSI method. A computational area is designed in the form of a horizontal tube filled with water flow; So that a solid or spherical object in the shape of a ball is immersed in it. In such models, there is a need for instantaneous and time-dependent change in modeling the model based on the type of displacement at the adjacent mesh boundaries. In determining dynamic mesh methods, smoothing and remeshing methods have been used.

Project number 3 simulates the movement of a submarine robot inside a canal containing water flow. The dynamic mesh method has been used to simulate the horizontal movement of this robot inside the channel. In this simulation, a two-dimensional channel is designed to flow at a speed of 1.5 m.s-1. Simultaneously, the robot inside the canal moves horizontally in the water flow path at a speed of 3 m.s-1  to define the instantaneous change of meshing.

In project number 4, Two cubes fall into the liquid. In general, it is essential to study the motion of objects in liquids. The fall of the cubes due to the acceleration of gravity helps a lot in understanding the phenomenon of sloshing. Sloshing occurs when a partially filled reservoir with fluid is subjected to permanent or transient external forces. The liquid’s free surface moves and hits the tank walls and exchanges forces with its wall. These forces may cause problems such as malfunctions of spacecraft.

Project number 5 simulates the fin rotational motion in a two-phase flow field under the influence of the generated oscillatory wave flow. The two-phase flow used in the problem is defined by the VOF model and consists of two phases. Due to the nature of the problem requiring displacement at the model boundaries, a dynamic mesh technique was used to define the fluid flow. Also, the UDF (user-defined function) is used to define the reciprocating motion of the scaffold wall that causes the waveform within the domain.

Project number 6 simulates the motion of a floating vessel in the water by the dynamic mesh method. In this simulation, a computational domain of water with a certain height level is designed with a floating vessel on the water’s surface. Six degrees of freedom (6-DOF) have also been used to define the type of dynamic mesh behavior; This means that the model can move and relocate in six degrees. The vessel is defined as a floating object on the water surface; the VOF multiphase flow model should be used; So that air is defined in the upper part of the computational domain and water in the lower part.

In the last watery problem, project number 7 simulates the motion of a submarine in the water. In this simulation, a computational domain including air and water with a certain level of water is designed Since the submarine has only One degree of freedom (1-DOF) and can only rotate around its central axis (x-axis), and in other degrees, it is constrained and has no transient or rotational motion, we use a UDF for defining this type of movement, considering a degree of freedom. Since the submarine is moving within a computational domain with two phases of water and air, the VOF multiphase flow model must be used.

Aerial application

In project number 8, a golf ball movement with an aerodynamic point of view has been studied. The force applied to the ball is equal to 200 N. The golf ball displacement due to the impact has been studied in terms of time.

Project number 9 simulates the water flow around a vertical-axis water turbine (VAWT) submerged in water using the dynamic mesh method. The water turbine is from vertical axis turbines and is of the Darrieus type. The axis of the turbine is perpendicular to the direction of water flow. The Dynamic Mesh model is used to define the instantaneous change of meshing around the rotating turbine blades. To define the type of motion of a rigid body, a rotational motion with one degree of freedom (1-DOF) should be specified; Thus, the mass of the blades was considered equal to 1 kg, and the moment of inertia of the blades was considered equal to 3.09 kg.m2. Due to the main nature of the model based on the use of dynamic mesh, the simulation process should be defined as transient (unsteady).

Finally, the last project (number 10) simulates the airflow around an airfoil using the Fluid Solid Interaction (FSI) method. Due to the fact that this airfoil is moving in the air at a considerable speed, the airflow collides with its body and exerts a force on it. As a result, we can say that a two-way confrontation occurs between the fluid and the solid.

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