in:Flux
in:Flux v4.40 Release Highlights
February 17, 2026
Multiple transient profiles can now be plotted in the monitor windows. Added filters to all the monitor data windows so that data from individual simulations can be easily extracted. Added filters to [...]
in:Flux v4.0 Release Highlights
July 23, 2025
in:Flux simulations can now be submitted to a cloud server for solving via in:Flux Cloud. Probits for toxic and thermal fatality assessments. New file format and many feature improvements...
in:Flux v3.0 Release Highlights
February 24, 2023
Major update to the in:Flux solver. Passive inlets and outlets for indoor ventilation. Mesh refinement regions. Toxic dose and thermal dose variables...
in:Flux v2.14 Release Highlights
July 7, 2022
User-defined transient inflow profiles. HCO reactions and user-defined reactions for fire simulations. Hydrogen fire support. Updated DIPPR database. STL Exporter...
Fire Modeling Overview Video
August 17, 2021
We are pleased to announce that Fire Modeling capability is now included with in:Flux. Set up hundreds of jet and pool fire scenarios in seconds.
in:Flux v2.0 Release Highlights
August 17, 2021
We are proud to announce the launch of Fire Modeling with in:Flux. Jet fires and pool fires can now be simulated with the same ease of use as dispersion cases...
Why We Wrote a Fire Model for in:Flux
August 17, 2021
One thing stood out to me while we were writing a fire model for in:Flux. CFD Fire Modeling is extremely challenging.
Mixing Geographic and Risk-Based Gas Mapping – Does it Work?
March 23, 2021
The "Concept of Proportionality", as defined in the new British Standard on Fire and Gas Mapping, states that, when undertaking a F&G mapping study, the approach should be proportional to the [...]
Correlating Gas Detection and Leak Location
March 2, 2021
A common assumption implicit in gas detection systems is that a gas cloud is detected in roughly the same location of the leak source. But how accurate is this assumption?
Can Gaussian Plume Models be used for Risk-Based Gas Mapping?
February 9, 2021
One of my favorite books is "I do like CFD" by Katate Masatuka. Well, "I do like Gaussian Plume models" – but I would never use one for Risk-Based Gas Mapping.
Why we wrote in:Flux
January 19, 2021
The first time we exhibited in:Flux was at the Hazards 26 conference in Edinburgh, 2016. "Aren't you reinventing the wheel?" asked one of the attendees.
Fire and Gas Mapping in 2021: What to Expect
January 12, 2021
Fire and Gas Mapping is a rapidly developing field, and 2021 will be no different. We saw a significant increase in Risk-Based Gas Mapping projects using in:Flux.
A Public Data Set for Risk-Based Gas Mapping
September 22, 2020
Technology is changing fast in the world of Fire and Gas Mapping. We have created a public data set based on an offshore module with 10,000 CFD simulations.
in:Flux v1.42 Release Highlights
September 3, 2020
More options for assigning consequence values in the Risk Manager. Wind Rose now shows Site North. More refined meshing options for helidecks...
Geographic or Risk-Based Mapping?
August 18, 2020
Choosing the right method for your project can be challenging. Here are some broad-brush guidelines from my own experience with the two methods.
The Future of Fire and Gas Mapping is Risk-Based
July 29, 2020
There isn't much doubt that the major technology change we will see over the next 10 years is Risk-Based Gas Mapping. What gives us the confidence?
Why Risk-Based Gas Mapping Reduces Detector Count
July 29, 2020
The reason risk-based gas mapping reduces detector count is stunningly simple. Consider the following analysis, which compares geographic and risk-based methods.
in:Flux v1.41 Release Highlights
July 9, 2020
Custom gas clouds can now be created in the Gas Cloud Analysis window. Heavy hydrocarbons now included from AIChE DIPPR database...
The Current State of Fire and Gas Mapping
June 23, 2020
I have done many marketing presentations since starting Insight Numerics, but one sticks out in my mind. It was 2014, one year after we had released Detect3D.
Developing the Adaptive Meshing Capability for in:Flux CFD
June 23, 2020
It's not an exaggeration to say that in:Flux was conceived around one idea: automatic, adaptive meshing. Why? Ask any CFD engineer about meshing.
Fire Model Part 2: Choosing the Right Level of Detail
June 16, 2020
Let me make a bold statement about CFD: Simple models perform above expectations; the opposite is true of complex models.
Fire Model Part 1: Designing a CFD Code
June 9, 2020
I started writing my first CFD code in 2007. Back then, it seemed obvious to me that CFD codes should be general purpose, written for skilled practitioners.
Developing a Fire Model for in:Flux CFD
June 3, 2020
The most common request we get from our users is to add a fire modeling capability to in:Flux. Yet there are existing fire modeling CFD codes – so why is everyone looking for something new?
in:Flux v1.39 Release Highlights
April 10, 2020
New Flammable Gas Volume Fraction %LFL post-processing variable. Warning for ifx:Solve files. Risk data set simulation summary window...
in:Flux v1.35 Release Highlights
March 4, 2020
User guide and tutorials linked to help.insightnumerics.com. Improved meshing for near-ground leaks. Improved speed for equipment pick tool...
in:Flux v1.34 Release Highlights
January 27, 2020
Helideck turbulence modeling capability for CAP437 studies. Project merging. Blowdown for transient high pressure gas leak simulations...
Risk Based Gas Detector Optimization
February 1, 2019
We are pleased to announce the release of in:Flux v1.20 which includes capabilities for risk analysis, including risk-based gas mapping and gas detector optimization.
Expediting CFD Dispersion Analysis Projects with in:Flux
April 1, 2018
CFD is now fast, inexpensive and accessible. Our new CFD software, in:Flux, enables any engineer to perform CFD analysis regardless of previous expertise.
Launch of in:Flux CFD Software
February 20, 2018
Insight Numerics is pleased to announce the launch of in:Flux CFD software for ventilation and dispersion modeling. The speed and simplicity of in:Flux is unrivaled.
Insight Numerics at Spadeadam
October 1, 2017
Insight Numerics visits the renowned Spadeadam Testing and Research Center in Cumbria, United Kingdom to further development of our team members.