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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…
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Heat Transfer Options in Altair Flow Simulator
Flow Simulator has various ways to include temperature change in a flow model. These range from simply adding heat to a flow chamber to more complex methods of coupling the flow network to a thermal network. Add Heat to Flow Chambers Heat can be added (or removed) directly to a flow chamber. This heat can come from any…
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Flowrate and Pressure Boundary Conditions in Altair Flow Simulator
Flowrate and Pressure Boundary Conditions Flow Simulator has the flexibility to specify flowrate or pressure boundary conditions. The choice depends on what information is known and what results the model should return. The 3 simple networks shown below illustrate the 3 different types of boundary conditions available. *…
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Defining Fluid Properties in Altair Flow Simulator
Fluid Property Sources The FS solver has “built-in” tables and equations for several fluids. Gas: Air (ideal gas) and mixtures of Air and Steam Liquids: Water, Jet-A Fuel, 3 types of Oil, Propylene and Ethylene Glycol NASA CEA can be used as a source of fluid properties as well as modeling combustion. It has a long list of…
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What’s New in Altair Flow Simulator 2024
Flow Network Grouping Items in the flow network can now be grouped like thermal network grouping introduced in the last release, 2023.1. The groups can be named and colored. All entities displayed within the group can also be colored with the group’s color. Collapsing the groups into blocks can help model organization,…
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Accelerating Model Creation with Altair Flow Simulator
Creating a complex flow and thermal model with Flow Simulator can be tedious. Here are some Tips-n-Tricks to accelerate your model creation. Item Creation Items are created in Flow Simulator by dragging from the element library to the modeling window. Quickly create multiple chambers by holding down the “Shift” key while…
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Webinar: Introduction to GE's Flow Simulator
An introductory webinar to Flow Simulator, an integrated flow, heat transfer, and combustion design software that enables mixed fidelity simulations to optimize machine and systems design. This fluid system design tool provides interdisciplinary modeling and optimization capabilities within a single platform for machine…
