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# VOF Multiphase Model Training Course, ANSYS Fluent

\$300.00 Student Discount

### Lesson 3: Example 2

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#### VOF Multiphase Model Concepts in ANSYS Fluent

• VOF applications & applicability
• VOF general settings
• Implicit vs. Explicit formulations
• Available discretization methods
• Body force formulation
• Open channel BC
• Interface modeling
• Level set method
• Surface tension modeling
• Mass transfer mechanisms

#### Microfluidic Droplet Generator, ANSYS Fluent Tutorial

• The problem numerically simulates the Microfluidic Droplet Generator using ANSYS FluentÂ software.
• We design the 2-D model by the Design ModelerÂ software.
• We mesh the model withÂ ANSYS Meshing software, and the element number equals 10,441.
• We perform this simulation as unsteady (Transient).
• The multiphase VOF modelÂ is used to model the phases of water and oil.
• Surface tension modeling along wall adhesion is enabled.

#### Sub-Oceanic Volcanic Activity ANSYS Fluent Training

• The problem numerically simulates the Sub-Oceanic Volcanic Activity using ANSYS FluentÂ software.
• We design the 2-D model by the Design ModelerÂ software.
• We mesh the model withÂ ANSYS Meshing software, and the element number equals 42,751.
• We perform this simulation as unsteady (Transient).
• The multiphase VOF modelÂ is used to model the three phases of air, water and vapor.
• Evaporation and condensation is used for mass transfer mechanism.

## VOF Multiphase Model Training Course

The Volume of Fluid (VOF) multiphase model is a numerical technique used to simulate the behavior of two or more immiscible fluids. It is based on the conservation of mass and momentum of each phase. This is used to manufacture a wide range of multiphase flows, such as bubbly, dispersed, and stratified flows.

The VOF model is capable of accurately capturing the interface between the two phases and can be used to simulate the motion of the interface, as well as the interaction between the two phases. The model can also capture the effects of surface tension, which is essential for simulating the behavior of droplets and bubbles.

The VOF model is widely used in a variety of engineering applications, such as the simulation of fuel injection systems, the design of cooling systems, and the analysis of multiphase flows in chemical reactors.

There are various CFD methods to employ this model. One of the most renowned methods is the Finite volume method implemented in ANSYS Fluent. Here in VOF Multiphase Model Training Course, these methods are going to be introduced.

ANSYS Fluent is a powerful tool that can simulate VOF-based multiphase flows. The implemented options and existing capabilities of this software can predict even the slightest fluctuations in the interface between phases.

## Training Course Syllabus

This course contains video lessons and final projects to get a certificate after finishing the course.

### Lesson 1: Introduction to the VOF model and its applications

In this lesson, you will first see a general introduction to the VOF Multiphase model and an overview of available simulation techniques and sub-models of the VOF in ANSYS Fluent. This section contains the following subsections:

• VOF applications & applicability
• VOF general settings
• Implicit vs. Explicit formulations
• Available discretization methods
• Body force formulation
• Open channel BC
• Interface modeling
• Level set method
• Surface tension modeling
• Mass transfer mechanisms

### Lesson 2: Microfluidic Droplet Generator

In this lesson, we present a simple, practical example for you. This problem examines the effect of surface tension on flow formation. Namely, we aim to simulate a real-life situation of microfluidic droplet generators.

They are devices used in the biomedical engineering field for quantifying the volume of fluid into micrometer-sized spherical droplets for different types of analyses. You can see how the definition of surface tension will cause a phase to take up a completely different form from its initial state.

### Lesson 3: Sub-Oceanic Volcanic Activity

In this lesson, we present a different example from the previous example. This time we are focusing on an immense scale of fluid domains. We will consider a large fluid in which multiple sub-oceanic volcanic mountains are placed.

The scenario is that the water adjacent to these mountains will reach a boiling state and evaporate due to the volcanic activity of the sub-oceanic mountains. The formed vapor bubbles will then reach the surface of the water where the wavy surface will be disrupted due to the motion of vapor bubbles, rupturing the interface of air and water.

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