What gas species should I initialize in my unit?
For a system with a mixture of reacting gases, the user has a decision whether to initialize the system with an inert gas (frequently, nitrogen), which will be displaced upon…
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Known Issues 16.0
Barracuda VR 16.0 Issues affecting this version: KI-1: Particle Drag is not calculated for pure liquid particles when simulation has no solid materials KI-2: 2D data is missing output conversion…
How to use Interact features from a script or the command line
If you’re interested in automatically controlling BCs based on user-specified parameters, please see the newer post: Using a PID Controller Script to Control Boundary Conditions Example Scenario Your model has a thermal…
What are appropriate cell aspect ratios?
The cell aspect ratio is the ratio of the longest to shortest side in a cell. A perfectly cubic cell would have an aspect ratio of 1, while a rod-shaped…
Using cutplanes in GMV
GMV cutplanes are a useful tool for visualizing 3-dimensional simulation results. They allow engineers to get a sense of the 3-dimensional behavior of a system by viewing several planes of…
How to track number of computational particles over time
In Barracuda simulations, it can be useful to track the number of computational particles present in the system over time. This can give users one indication of whether the particle…
How to generate animations in batch mode
Note: This post assumes two things: GMV attribute files have been generated and You are using GMV 4.5.7 or newer on Linux. BATCHMOVIE.sh is a script, bundled with recent Barracuda…
Can I specify a heat flux at a thermal wall instead of a temperature?
Currently the only option for thermal walls is to specify a temperature. This is has a nice physical basis, as the temperature gradient is the driving force for heat transfer. …
Why do I get mass balance errors for my chemical reactions?
We frequently see questions similar to the following: “I’m sure that the stoichiometry of the reaction I’ve entered is correct but I continue to get a mass balance error. What…
Why is the contact friction model off by default?
Before discussing default settings, let’s first consider the motivation behind the contact friction model. The Eulerian/Lagrangian formulation of the fluid/particle flow equations used by Barracuda is what allows it to…