Discrete Phase Model (DPM) Training Course

Description

Discrete Phase Model (DPM) Training Course

The discrete Phase Model (DPM) will teach you how to simulate problems which has a dispersed phase. You`ll get acquainted with all the required steps in order to use the DPM module in ANSYS Fluent.

First of all, we have an overview of the DPM fundamentals and the required assumptions that need to be taken in order to simplify the problems. Next, all the related options related to the DPM module in ANSYS Fluent software are explained in detail in a separate chapter. Finally, we have several practical training examples.

Training Course Syllabus

This course is divided into 4 main chapters. You strongly recommend that you do not skip any of the sections even if you feel you know the content because there all lots of practical points within the explanations, especially in chapter 4 during the simulation processes.

Chapter 1: (DPM Concepts)

In this chapter, we will have a general introduction to the discrete phase model (DPM) and an overview of its application, limitations, pros & cons, and prerequisites. This section contains the following subsections:

• Introduction and overview of the Discrete Phase Model (DPM)
• Introduction to Lagrangian Framework Reference
• Overview of DPM application in industries and real-world examples
• DPM pros & cons, including:

– Advantages over other models

– Limitations

– Introduction to Dense Discrete Phase Model (DDPM) application

• Particle Life Cycle
• Introduction to Governing & Trajectories Equations
• Particle Fate
• Introduction to Grid-independence study of a DPM case

Chapter 2: Exploring the ANSYS Fluent 

In the 2nd chapter, we get into the software and explain almost every Discrete Phase Model panel section. It has been tried to investigate various available models. This chapter summarizes the following subjects:

• Discrete Phase Model Dialog Box: Interaction, Particle Treatment
• Tracking parameters
• Physical Models: Particle Radiation Interaction, Thermophoretic force, Saffman Lift force, Virtual mass force, Pressure gradient force, Erosion/Accretion, Pressure-dependent boiling, Temperature dependant latent heat, Two-way turbulence coupling, DEM collision, Stochastic collision, Coalescence, Breakup,
• Injection Dialog Box
• Injection Type: Single, Group, Surface, Cone
• Injection Particle Type: Massless, Inert, Droplet, Combusting, Multi-component
• Diameter Distribution: Linear, Uniform, Rosin-rammler, Rosin-rammler logarythmic
• Drag laws: Spherical, Non-spherical, Stokes-cunningham, High-Mach-number, Dynamic drag
• Breakup Models: TAB, Wave
• Turbulent Dispersion: Stochastic tracking, Cloud tracking
• Parcel
• DPM Boundary Condition: Reflect, Trap, Escape, Wall-jet, Wall-film

Chapter 3: Spraying (Considering Evaporation & Breakup)

In this project, we aim to simulate the water spraying from a nozzle considering the breakup of droplets and evaporation using the Discrete Phase Model (DPM) and Species Transport model. It can be claimed that this simulation is the most accurate spraying procedure modeling, which considers all details.

Stochastic collision & coalescence, and droplet breakup are considered by using the Taylor analogy breakup model (TAB).In the spraying process, the droplets are distorted and their shape doesn’t remain spherical. On the other hand, the drag coefficient strongly depends on droplet shape. Thus, dynamic-drag drag law and Discrete Random Walk Model are used. Furthermore, the floor has a Wall-film DPM boundary condition leading to film formation instead of terminating trajectory calculations.

Chapter 4: Wet Combustion (Using Combusting Particle)

In this project, the wet combustion of anthracite volatile in a combustion chamber using combusting particles is simulated. We aim to track fuel particles from the beginning of devolatilization, oxidizing and producing carbon dioxide & water vapor.

Species transport and discrete phase model (DPM) have been used to simulate anthracite particles. The combusting particle type is hired with a 2% liquid fraction. The initial temperature of particles is 325K with nonspherical shape and rosin-rammler diameter distribution.

Chapter 5: Erosion in a channel (Inert Sand Particles)

n this project, the impure water flows in an obstruction channel using ANSYS Fluent software. The aim of the study is to determine the obstacle effect on water pathlines and how it can cause damage to the channel over time. As a result, the Discrete Phase Model (DPM) module is used to simulate sand particles and erosion/accretion.

Chapter 6: Respiratory Disease (Sub-micron particles)

In this project, we set the target to design an ICU considering thermal comfort conditions including PMV & PPD. Also, It is important to prevent the transmission of infectious diseases. In the project, one patient called patient #1 is suffering from a respiratory disease which puts an infection scenario in more attention.