Introduction This article discusses DPM boundary conditions, including reflect, trap, escape, wall-jet and wall-film. Discrete phase boundary condition In discrete phase simulations, the interaction between particles and walls is essential to significantly predict a particle’s fate because wall impingement may…
Introduction To DPM Physical Models In this article, we aim to investigate all DPM physical models provided in ANSYS Fluent. Physical Models Particle Radiation Interaction The radiation effects must be considered in cases where a high temperature dominates the fluid…
Introduction In this article, different types of air-assist atomizers are introduced and air-blast, flat-fan and Effervescent atomizer models are explained. Air-Blast/Air-Assisted Atomizer Model The Fluent Air-Blast / Air-Assisted Atomizer model is a derivative of the Pressure Swirl Atomizer model. An…
Introduction In this article, we investigate the motion of a particle from its injection to its final probable destination. Particle Motion In a separate article, the trajectory calculations were discussed briefly. The governing equation on the discrete phase in general…
Introduction This article introduces the parcel concept and its available release methods. Also, the DPM mass flow rate parameter in ANSYS Fluent is investigated via a descriptive tutorial. Parcel Concept Parcel in ANSYS Fluent software is defined as a group of monologue particles with…
Introduction This article discusses all drag law models provided in ANSYS Fluent software. There are 14 models available. It has been tried to investigate the most applicable models. Drag Law Models Totally, there are fourteen drag law models available in…
Grid Independence Study in DPM In numerical studies, the governing equations are discretized and rewritten in each cell. To have an exact CFD solution, we must generate an appropriate meshgrid to accurately capture variables value in each cell. The mesh…
Introduction This section will investigate the evaporation process modeling in Ansys Fluent software. Two main methods will be discussed separately. Droplet evaporation & Multi-component evaporation. Droplet Evaporation The evaporation process should be studied from two different aspects; Heat transfer and…
Bosch Common Rail Injector Introduction and Purpose of the Case Study The Bosch fuel injection system delivers the metered quantity at high pressure to mix with compressed air inside the combustion chamber for efficient combustion, And The Bosch Common Rail…
Introduction In many industrial applications, the injected droplets don`t remain constant in shape and distortion occurs due to body forces and hydraulic instability. Thus, a breakup breaks the parent droplets into smaller children. The most well-known application is in sprays…
Introduction This article introduces discrete phase model (DPM) laws, particle types and available injection types. It has been tried to explain the most applicable injection types in detail. DPM Laws There are five particle types available in ANSYS Fluent software.…
In this article, we present the main steps through simulating spray modeling using DPM, in 5 steps, from general settings to post-processing and also you can see useful tips. To start with, select the Discrete phase in the Models tab of…
Introduction In this article, different types of atomizers are introduced. Also, Plain-Orifice and Pressure Swirl atomizer models are discussed. Type of Atomizers ANSYS FLUENT offers sophisticated injection types for sprays that describe breakup phenomena. For most injections, you must provide the particles'…
Introduction This article investigates the general settings of any DPM simulation located in the Discrete Phase Model dialog box, including interaction, particle tracking and particle treatment. Interaction The following figure shows that the first window consists of three main…
DPM Abstract In this article, We overview the concept of the discrete phase model, assumptions, governing equations, and some limitations of the model. Overview of DPM In fact, any flow consisting of two or more phases is called multiphase. From…
An Introduction to DPM Spray Literally, sprays are considered a combination of droplets immersed in a gaseous phase known as the continuous phase. They`re employed in most industries and have a wide range of applications in drying, applying chemicals, washing,…
Tips About DPM To simulate the evaporation process of droplets, we need to define the thermophysical properties of Material accurately. Saturation vapor pressure, Binary diffusivity, latent heat, boiling point, and specific heat should be considered. These parameters are accessible in…
Introduction to DPM Diameter Distribution In Ansys Fluent software, five interpolation methods are available to determine the size of DPM particles, including linear, uniform, rosin-rammler, rosin rammler logarithmic and tabulated. In this article, we aim to investigate each specification and its limitations.…
Introduction By entering particles in a turbulent eddy, they try to follow it when they pass through the eddy. In this article, we aim to investigate two turbulent dispersion model available in Ansys Fluent software. Stochastic Tracking Cloud Tracking Stochastic…
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