We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.
Multiphase Flows

Multiphase Flows

  1. All Categories
  2. Fluids - Multiphase Flows
  3. How to stabilize DPM evaporation rates of droplets in incompressible cases? How to remove dependency of evaporation rates of droplets from local pressure?

How to stabilize DPM evaporation rates of droplets in incompressible cases? How to remove dependency of evaporation rates of droplets from local pressure?

Tagged: fluent, fluid-dynamics, MP - Particle Tracking, multiphase, phase-change
    • January 25, 2023 at 7:17 am
      FAQFAQ
      Participant

      According to chapter 16.4.2. in the R19.1 Fluent Theory Guide, for the diffusion-controlled vaporization model the evaporation rate is calculated based on equations (16–101), (16–102) and (16–103). Equation (16–103) calculates the concentration of vapor in the bulk gas as a function of the local absolute pressure. In a case with a fluctuation pressure field this can lead to significant fluctuations of the evaporation rate (DPM Mass Sources). With the command (rpsetvar ‘dpm/absolute-pressure #f) the concentration of vapor in the bulk gas can be calculated as function of the operating pressure. This can help stabilizing the evaporation rates (DPM Mass Sources). Keywords: DPM, DPM Mass Sources, fluctuations, incompressible, evaporation, droplet, diffusion-controlled vaprorization

Featured Articles

Introducing Ansys Electronics Desktop on Ansys Cloud

The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)

This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...

Introducing the GEKO Turbulence Model in Ansys Fluent

The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...

Postprocessing on Ansys EnSight

This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.

© 2025 Copyright ANSYS, Inc. All rights reserved.