# Multiphase Flow Modeling Using ANSYS FLUENT

Most of the fluid flow phenomenon occurring in chemical and process industry involves presence of multiple phases. In order to tackle these complexities and to correctly design such processes it becomes essential to get detailed insight into multiphase physics and its effect on the overall performance or operation of the process. CFD based Multiphase flow modeling tools are now considered as highly reliable technology to obtain complete understanding of flow and thermal behaviors of broad range of multiphase flow applications. For tackling problems involving modeling of multiphase flow it is not just sufficient to be familiar with CFD software or its process. A CFD analyst requires additional knowledge of multiphase flows, equations which resolve multiphase flows, and software skills to apply multiphase flow models to real world phenomenon. This course will teach you all aspects of multiphase flow modeling using ANSYS FLUENT as CFD software.

##### Recommended background

A technical education background is preferred for this course. An engineering degree will definitely be beneficial although it is not mandatory. A participant must be familiar with process of conducting CFD analysis using ANSYS FLUENT and ICEM CFD. Please note that you will not require any expertise in ANSYS FLUENT and ICEM CFD, but only beginner’s level knowledge is required.

If you do not have required experience in use of ANSYS FLUENT and ANSYS ICEM CFD we recommend you to take our course ‘CFD Modeling Using ANSYS ICEM CFD and ANSYS FLUENT’ before this course. For more details please visit the course webpage.

##### Your Learning

By the end of this course you will gain expertise in conducting multiphase flow modeling using ANSYS FLUENT. Apart from teaching software skills our objective in this course is also to make you understand how CFD is used as a design tool for simulation based studies involving multiphase flow systems.

Below will be your learning in this course:

- You will have better understanding of fundamentals of multiphase flow.
- You will clearly understand how CFD equations are modified for simulation of multiphase flows.
- You will learn how to conduct CFD simulation of fluid flows involving multiple phases.
- You will learn how to conceptualize a multiphase flow problem and apply different multiphase models to simulate it.
- You will realize the benefit of using CFD based models for design of multiphase flow systems.

The course mainly contains video lessons based on fundamental theory and software skills. Apart from video lessons you can also request for on demand demos from which you will get better understanding of software application. The course is delivered based on a concept of ‘learning lessons accompanied with live mentoring sessions’. Initial section of the course contain fundamental lessons, middle part is based on techniques used to model multiphase flows and last part will teach you all software skills to model such flows using ANSYS FLUENT. Based on the content of the video lessons and mentoring time you can expect to complete the course in 2 to 3 weeks.

##### Course Format

The course mainly contains video lessons. The duration of each lesson varies from few minutes for some simpler lessons to 40 minutes for some complex lessons. For short software demos the duration is very small and for detailed software related lessons the duration is large. The course also contains other content like tests and assignments. The course is delivered based on a concept of ‘online learning using video lessons accompanied with live mentoring’.

Below are features or elements of our training process :

**Video lessons :** The course consists of video lessons on various topics of theory and
software knowledge. You can gain knowledge and software skills by watching these video lessons any number
of times.

**Video tutorial :** Video tutorial will also be provided to you as part of the course.
They are sample CFD problems which explain or demonstrate how to conduct CFD simulation of common
industrial problems using the software ANSYS FLUENT.

**Software Demos:** The course also consists of on demand as well as recorded software demos.
These short videos explain some tools or operations of software so that you can watch and practice on your
own.

**Course Assignments :** After certain software learning is complete you will be provided
with assignments. These assignments will be industrial level mesh generation or CFD simulation problems
which you will have to do on your own using skills acquired in the course. You will be provided with all
the necessary input files for the assignments. Once you complete these assignments you will have to submit
them to us for evaluation.

**Mentoring :** Along with
our course content we also provide mentoring for the participants in this course. The mentoring is
provided to resolve any of your doubts or question related to the course learning. There are two types
of mentoring :

- Unlimited mentoring through email: During the course you may have queries or doubts about the course content. To resolve those queries our mentors will interact with you using email. You can ask your queries through email and our mentors will provide you with specific answers to help resolve your queries.
- Limited hours of live mentoring: In this our mentors will conduct a live mentoring session with you every week for an hour. So total you get 2 to 3 hours of live mentoring as part of the course. These live mentoring sessions will be sought of Q & A sessions to resolve any of your doubts related to the course learning. You can directly ask your questions to our mentor.

Please note that mentoring through email and live session is meant to resolve your queries related to learning through the course. This mentoring does not cover any queries which are not related to the course or for any of your other CFD related queries. For such queries we recommend to you our other learning services. Information of such learning services can be found on course page.

**Certification :** At the end of the course based on your performance and our evaluation
you will be granted a certification from LearnCAx for successful completion of the course.

**Course Material :** At the end of the course LearnCAx will send you course material in the
form of course lesson notes for your future reference.

##### Course Syllabus

The course is divided into 14 lessons and additional content like assignment. Each lesson has a specific objective and is designed to satisfy the needs of subsequent lesson. It is recommended that you do not move to the next lesson until all the concepts in a lesson are well understood.

** Video Lessons :**

**Lesson 1: ****Study of Fluid flows**

Have you ever observed common fluid flow phenomenon around you? Have you ever wondered about the physics behind such fluid flows? Whether they can be described by using mathematics and who discovered such mathematical equations of fluid flows? Fluid flow is present everywhere. The aim of this lesson is to show you how every phenomenon around us involves fluid flow. The lesson will present a discussion on the three fundamental methods used to study fluid flow. In the end you will also understand where simulation finds its place as tool to study fluid flow and allied phenomenon.

**Lesson 2: Introduction to CFD **

Assuming that most of the participants a revision of the topic of CFD, this lesson is designed as an introduction to CFD. CFD is a distinct field of simulation sciences which is based on physics and mathematical equations. Hence this lesson is designed in order to provide you a complete understanding of overall concept of CFD. This lesson provides the basics of Computational Fluid Dynamics (CFD) without going into details of the mathematics or numerical algorithms. By the end of this lesson you will have a clear understanding of CFD and terms like Design, Modeling, Simulation and CFD. You will also realize that CFD is very interesting and highly useful design tool.

**Lesson 3: ****CFD Equations and Numerical Solution **

We believe that every participant of our course, who uses CFD software, should also be aware of what is happening behind the software. Behind the software there are physics equations solved using numerical methods. This lesson is designed in such a way that you will get a basic understanding of the generalized CFD equations and the numerical methods that are used to solve these equations. The objective of this lesson is to refresh the knowledge of mathematical equations which govern fluid flow and heat and also to provide an overview of the additional equations that are solved in CFD. By the end of this lesson you will be familiar with Navier Stokes equations and the difference between exact and numerical solution of differential Equations.

**Lesson 4: Fundamentals of Finite Volume method**

One of the most commonly used algorithms to convert the partial differential equation to algebraic equations is the Finite Volume Method. It is also the method used for CFD calculations in FLUENT software. Hence it is critical to understand the finite volume method. In this lesson we will see how the Navier Stokes equations are converted into mathematical formulations using the finite volume methods. This lesson would explain how to convert the integral form of conservation equations into linear algebraic equations, using Finite Volume Method. By the end of this lesson you will have a clear understanding of the Finite Volume Method.

**Lesson 5: ****CFD Analysis from Software perspective**

Objective of this lesson is to introduce you to the world of commercial CFD software. While providing an introduction to performing CFD analysis using software, we also focus on teaching you what happens behind the software. Basic steps of any general CFD analysis process will be taught. By the end of this lesson you will know what to expect from a generic CFD software program and also what are general steps involved in CFD analysis using CFD software.

**Lesson 6: ****User Interface of ANSYS FLUENT**

The objective of this course is to provide a review of the graphic user interface (GUI) of the software ANSYS FLUENT. Before starting to use any software you should be well familiar with the user interface, various mouse options and clicks as well panel locations and buttons. This lesson will provide you with all the knowledge required to handle FLUENT software user interface. By the end of this lesson you will be able to carry out basic tasks while using ANSYS FLUENT and also navigation through the User Interface of ANSYS FLUENT.

**Lesson 7: ****Introduction to Multiphase flows**

Before you start using CFD for simulating multiphase flows, you should have a clear understanding of multiphase flows and their fundamental theory. This lesson will introduce you to the fundamentals of multiphase flows. All terminologies and concepts related to multiphase flows will be introduced to you. At the end of the lesson you will have a clear understanding of what multiphase flow is and how it is different from single phase flow. You will also learn how to identify and categorize multiphase flows.

**Lesson 8: ****Fundamentals of multiphase flow modeling**

To model multiphase flow it is not just sufficient to consider Navier Stokes equations. Additional modeling equations and techniques are involved in simulation of a multiphase flow phenomenon. In this lesson you will learn how modeling equations are modified in order to simulate multiphase flows. By the end of this lesson you will become familiar with multiphase modeling equations and the popular modeling approaches of eulerian-lagrangian, eulerian-eulerian and volume of fluid.

**Lesson 9: ****Introduction to Multiphase flow modeling in ANSYS FLUENT**

When you use any commercial software for simulation of multiphase flows there are some standard processes and modeling features. The aim of this lesson is to make you familiar with multiphase modeling process and available models for the same. By the end of this lesson you will be comfortable with multiphase flow models in FLUENT and you will also know how to make their selection for simulation of real world multiphase flow systems.

**Lesson 10: ****Eulerian-Eulerian multiphase model in ANSYS FLUENT**

You may have seen the phenomenon of water droplets falling in air. Evaporation of such falling droplets might also occur due to heat transfer. Also bubble columns are commonly used in chemical industry where liquid column is sparged by bubbles. How will you carry out CFD simulation of such phenomenon? For such simulation the Eulerian Eulerian multiphase model is used. This lesson will teach you the theory and implementation of the Eulerian-Eulerian multiphase model in ANSYS FLUENT.

**Lesson 11: ****Volume of Fluid (VOF) model in ANSYS FLUENT**

Imagine the fuel tank of your vehicle. When you accelerate or suddenly apply brake to your vehicle do you think there will be splashing of fuel inside that fuel tank? Do you think this will affect the performance of vehicle? Is this taken into consideration while the tank is designed? Are you aware that Volume of Fluid model in CFD is used to simulate such sloshing phenomenon as it comes under multiphase flow category? In this lesson you will learn how to use the VOF multiphase flow model to simulate multiphase flow systems.

**Lesson 12: ****Discrete Phase model (DPM) in ANSYS FLUENT**

What if solid or liquid particles are also flowing along with fluid flow? How will you apply CFD for simulation of such flow systems? The answer lies in use of discrete phase model. This lesson will first explain the modeling approach and governing equations of the discrete phase model (DPM). A brief review of the Eulerian Lagrangian approach will also be included. By the end of this lesson you will be well familiar with modeling different types of dispersed phase multiphase flows using ANSYS FLUENT.

**Lesson 13: ****Mixture model in ANSYS FLUENT**

Another simplified multiphase model available in ANSYS FLUENT is the mixture model. This is a good substitute for the Eulerian Eulerian model in some cases. It can be used to model phenomenon like sedimentation, cyclone separators, particle-laden flows with low loading, and bubbly flows where the gas volume fraction remains low. In this lesson you will learn the details and application of the mixture model. You will be able to decide when to select mixture model and how to implement a simulation using the mixture model.

**Lesson 14: ****Wet Steam Model in ANSYS FLUENT**

Consider a system like steam turbine where at the exit of the turbine there is possibility of presence of wet steam. Problems like erosion can occur due to this. If such problem is to be analyzed using CFD there should be consideration of wet steam as it is not a purely gaseous steam flow. For this there is a model called Wet Steam model which is a modification of the Eulerian Eulerian approach. In this lesson you will learn the theory, application and implementation of the Wet Steam model.

** Video Tutorials :**

**Tutorial 1: ****CFD simulation of sloshing phenomenon**

The aim of this tutorial is to demonstrate you the use of VOF model for simulation of sloshing phenomenon. Through this tutorial you will become comfortable in using VOF multiphase model as well as overall process of formulating a multiphase flow CFD simulation.

** Course Assignments :**

**Assignment 1: ****Modeling multiphase flow through channel**

The aim of this course assignment is to provide you practice in applying multiphase modeling techniques to carry out simulation of a flow phenomenon. This assignment deals with modeling flow through channel connecting two chambers. After completing this assignment you will be comfortable in selecting and implementation of one of the multiphase model that you learned in the course.

**Assignment 2: ****Modeling flow of granular solid particles along a fluid stream**

This second course assignment deals with modeling flow of granular solid particles along a fluid stream. After completing this assignment you will be comfortable in selection and implementation of one of the multiphase model that you learned in the course.

**Assignment 3: ****Modeling particle-laden flow in a duct system**

The third course assignment deals with modeling particle-laden flow in a duct system. After completing this assignment you will be comfortable in selecting and implementation of one of the multiphase model that you learned in the course.

**1. Do I need to know ANSYS FLUENT software before I take this course?**

Yes. You should be familiar with usage of ANSYS FLUENT software for basic flow and heat transfer modeling before you take this course.

**2. Do I need to know meshing software before I take this course?**

Ideally it is recommended that you know mesh generation using either ICEM CFD or any other meshing software before you take this course. Knowing mesh generation process will help you to carry out future CFD related work assignments on your own. Although the assignments within this course do not require any knowledge of mesh generation as already meshed file will be provided to you.

**3. Why is it mandatory to know ANSYS FLUENT software before I take this course?**

The course is designed assuming that the participant is familiar with basic usage of ANSYS FLUENT software. Hence if you are not familiar with ANSYS FLUENT software you may not understand the content of the course.

**4. Will the course mentor teach me ANSYS FLUENT during the course if I am not comfortable with the
software**

No the course mentor will only resolve your queries related to multiphase flow modeling and not basic software skills of ANSYS FLUENT.

**5. How do I know this course is appropriate for me?**

If you are interested in CFD and already know CFD software ANSYS FLUENT then taking this course will benefit you as you will learn advanced modeling techniques.

**6. Are there any specific industrial fields to which this course can be related?**

Yes. Multiphase flow modeling finds wide range of applications in the field of chemical and process industry. Hence it can be said that this course is related to these industrial fields.

**7. I am not familiar with fundamentals of multiphase flows. Can I still take this course?**

Yes. The starting portion of the course will review fundamental knowledge of multiphase flows. Hence even if you are not aware of fundamentals of multiphase flows you can still benefit from this course. Additionally our mentors will recommend you further readings for enhancing your knowledge of multiphase flows.

**8. Do I need to have any specific degree or background for taking this course?**

It is not mandatory to have any specific degree for taking this course. But having a background of mechanical, chemical, petroleum or process industry or field will be beneficial.

**9. When can I start the course and how much time is needed to complete the course?**

The course is available all the time. To start this course you need to buy the course. After this our executive will contact you and guide you through further process in order to activate your course. The course usually gets activated within 1 to 2 working days once all processing is completed. Considering difficulty level, understanding capacity and necessary extra reading and assignments to be done; on an average, we expect this course to be completed in 2 to 3 weeks.

**10. Why is it important to learn CFD skills? Why is CFD becoming popular in industry?**

CFD has become an important tool in design process in product and process industry across industry domain. The importance of simulation is increasing rapidly as it results in better product in shorter design cycle. Also the end cost of product is reduced because of use of simulations and CFD forms an important part of simulation based product development. Hence the use of CFD in industry and research has increased and will keep on growing. Due to same reason, it becomes beneficial to acquire CFD skills.

**11. How difficult is this course?**

This course is intensive in terms of knowledge, training and practice involved. It is considered to be an advanced level course. You need to be familiar with usage of FLUENT software to understand the content of this course. If you have an interest in multiphase flows and willingness to study and practice then you will not find this course difficult.

**12. I have few queries related to work I am doing. Can I contact you? **

Yes certainly. Feel free to ask those questions using the link “Ask a Question” given on course page.

**13. I am a student in undergraduate degree. Is it too soon to learn CFD? Will I understand it?**

No. It is not too soon. In fact this is the right time to get involved in CFD related learning. The earlier you gain knowledge of CFD, the better it is for you. You can conduct research in CFD in your academic life as well as this will open up many career opportunities related to CFD.

**14. What is ANSYS FLUENT and ANSYS ICEM CFD?**

ANSYS, Inc. is an engineering simulation software developer. ANSYS FLUENT software is CFD software from ANSYS which has broad physical modeling capabilities needed to model flow, turbulence, heat transfer, and reactions for industrial applications. Thousands of companies throughout the world benefit from the use of ANSYS FLUENT software as an integral part of the design and optimization phases of their product development. ICEM CFD is a mesh generation software from ANSYS.

**15. Why is this course based on ANSYS FLUENT? **

ANSYS FLUENT is among the most commonly used CFD tool in industry and academia. Due to this it is beneficial to learn these products as in most of the industries and research facilities you will be exposed to projects related to these software tools. Also they are highly robust, validated and efficient tools for conducting CFD analysis.

**16. Does your course provide access to software for practice?**

No. Participants have to arrange for their own access to software for practice.

**17. Do you provide certification?**

Yes. After successful completion of the course we provide certification to participants.

**18. Is it possible to learn software using online learning?**

Yes. Online learning has already been established as one of leading methods for cost effective and flexible software learning.

**19. I am weak in fundamentals of fluid dynamics or forgotten them. Can I take this course?**

Our course content will help you to review your fundamental knowledge about fluid dynamics. Also our course mentors will guide you on methods to strengthen your knowledge of fluid dynamics. So this is not a problem while you take the course.