Fluent reports for example Deleted 200 particles in injection jet3b during transient iteration What are possible reasons for this?
January 25, 2023 at 7:17 amFAQParticipant
The message can be the result of various things: 0) If particle tracking does not use the fluid flow time step, this message is generated during sub cycling of transient DPM particles in an unsteady fluid flow simulation. This is basically to avoid a particle mass imbalance during sub cycling and when tracking particles at a smaller time step than the fluid. In the end of the fluid time step the particles are advanced. During this “Advancing DPM injections” step the injected particles are no more deleted. There is no action needed for this message in this case. 1) Manipulation of the simulation time (changing the rp-var flow-time) 2) Activation of the break-up and collision model 3) Too small particles are injected (threshold value depends on injection type (inert, droplet, multicomponent etc.)) 4) Particles are injected outside of the flow field
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.
- Solver message during DPM calculation: “number of stepsize underflows during particle integration step is x”. What does it mean and how to get rid of it?
- ANSYS Fluent: Efficient Modeling of Spray Breakup using VOF-to-DPM Transition
- ANSYS Fluent: Describing Cavitation in a Centrifugal Pump
- Simulation of Exhaust Gas Recirculation (EGR) Cooler with CFD
- Mixing Tank Modeling in ANSYS Fluent
- ANSYS Fluent: Lifeboat Launch – Overset & Dynamic Meshes with the Volume of Fluid Model
- Hydrodynamics and Wave Impact Analysis
- Optimizing Solid Distribution in Continuous Stirred-Tank Reactor
- ANSYS Fluent: Simulating Multiphase Mixing within a Sparging Tank – Part 1
- ANSYS Fluent: Simulating Multiphase Mixing within a Sparging Tank – Part 2