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Cant see contours in my simulation?
I am simulating a flow through porous cylinder mimicking metal hydride LaNi5. After solving, I dont see my model displayed in the results section. There is proof of the simulation being completed as shown in the convergence plots. However, this is what appears on my screen after solving. When I hover over with the mouse,…
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Using the Flow Simulator Variable Editor
The variable editor in Flow Simulator (FS) is an easy yet powerful way to change many inputs quickly. If many model inputs use the same number (a hole diameter for example), consider using a variable to parameterize the input. Variables can be simple numeric input or an equation that can calculate an input based on other…
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Can't launch Flow Simulator, it gives weird license error
Hello, I have a student licence. I have done the activation via C:\Program Files\Altair\2025\security\bin\win64\gui and almutil_gui.exe. However, Flow Simulator gives me this odd error below: Do yo know how to solve this problem? Regards, Studente
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Addressing Flow Simulator Solver Convergence Issues
Flow Simulator (FS), like many iterative solvers, can have convergence issues. This discussion provides some information on the FS solver and provides some suggestions to address convergence issues. Introduction The FS solver uses an iterative procedure to solve for the element flow rates and nonboundary chamber pressures.…
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Material Assignment for Plenum on Flow Simulator 2025
Dear Sir, I try to change material from Air to Water on property editor for the boundary plenum. But, only four material, air, air-setam mixture, steam and Humid Air, can be selected from the material list. How could I specify the water for the boundary Plenum on Property Editor? Best regards, John Yang
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Create Flow Elements Using CAD Geometry in Altair Flow Simulator
Flow Simulator (FS) can automatically create some flow elements directly from CAD geometry. This discussion describes the methods, features, and limitations of this useful tool in the FS user interface (UI). Introduction FS is a tool that can be used throughout the design cycle. Preliminary design studies can be conducted…
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How to create vertices and drag tube/bends in altair flow simulator?
I checked tutorials and documentation but its not helping me. I created vertices using select option and tried to drag tube/bend into my geometry, they are not getting fixed on the location.
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How to give fluid properties in this non boundary plenum in Altair flow simulator?
Unable to give fluid properties to the plenum shown here. How to configure?
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Organize Models Using Groups in Altair Flow Simulator
Flow Simulator (FS) models can contain hundreds or even thousands of chambers, elements, thermal nodes, and resistors. Creating groups is a powerful way to organize and visualize these items in large models. Read this article to learn more about creating and managing groups. Grouping overview The Flow Model Browser and the…
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Introduction to the Application Programming Interface (API) in Altair Flow Simulator
The Flow Simulator (FS) API allows users to create a main control program to load the FS solver DLL to perform basic functions such as loading and running a model. The API can be used to couple a FS model with another solver (ex: a thermal solver for 2D or 3D parts) The following features are currently available in FS DLL:…
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Using Mission Data with Transient Analysis in Altair Flow Simulator
A transient analysis in Flow Simulator (FS) often requires boundary conditions that change with time. A mission component is used to store a table of time dependent data. A controller is used to transfer data from the mission component to the model boundary conditions. Creating a Mission Component A mission component is a…
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Post-Processing Results in Altair Flow Simulator
Visualizing results is important to the understanding of a flow or thermal network. Flow Simulator can display results using text, color, or plots. Read this for a quick review of each type of post processing. The first step is always to have a results file loaded into the FS user interface. The results file is…
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Custom Heat Transfer Coefficients in Altair Flow Simulator
Flow Simulator (FS) has many built-in heat transfer coefficient (HTC) correlations, but FS may not include a correlation required by the user. Fortunately, it is easy to add your own correlation to FS. This blog explores the customization manager for HTC correlations. There are numerous HTC correlations in the public…
