Interior and exterior CFD

Thermal airflow modeling for critical facilities.

Data halls, electrical rooms and telecom shelters inside; buildings, rooftop plant and wind outside. Built in CoolSim on your PC and solved with Ansys Fluent on our cluster. Every job is monitored, and if one fails, an engineer fixes it and runs it again.

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A cold aisle in a CoolSim model of a data center hall: cool supply air rising from the floor tiles, warm exhaust running back over the ceiling to the cooling units

31,000+ customer simulations delivered since 2016

2005 developed at Fluent, Inc.

Trusted by data center builders worldwide

Two ways to work with us

Build it yourself, or have us build it.

A CoolSim model of a data hall seen from above with the roof cut away: rows of racks with contained hot aisles, the racks' warm exhaust held inside each aisle as an orange haze, and blue lines of cool air along the rows

CoolSim software

Ansys solvers without the Ansys license, or a workstation to run them on.

01
Build. Drag in racks, CRACs, tiles, ducts and containment from built-in libraries.
02
Solve. Meshed with Icepak and solved with Fluent, up to four CRAC scenarios per job.
03
Report. Every rack against the ASHRAE ranges, shared as a link. See a sample

Download CoolSim How it works

A data center campus of three buildings seen from above: the warm discharge of the rooftop and ground-level equipment drifts away downwind as an orange cloud

Engineering studies

Send the drawings and the question. Our CFD engineers build the model, agree the cases with you, run them and walk you through the report.

Scope a study All studies

External flow and dispersion

Heat and exhaust, across the whole site.

The wind decides where a campus's warm discharge and diesel exhaust go. We model every building and every piece of equipment together, and report what reaches each intake.

Scope a site study External Flow in CoolSim

Looking along the gap between two buildings of a data center campus: generators beside one building, condensing units on the neighboring roof, lines of the equipment's warm discharge drifting across both and of the cooler air the far units draw in

Heat · campus airflow

Whose discharge each chiller breathes.

35 of 42 condensing units on our demo campus took in air more than 3.6 °F above the outdoor air, on a 110 °F day in a 35 mph wind.

Warm exhaust air, drawn in orange, drifting over a row of buildings on the wind

Exhaust · NOx dispersion

What reaches each air intake.

Generators, boiler stacks, idling trucks and ambulance bays: NO₂ and CO at every intake and louver, against EPA's 1-hour limits of 100 ppb and 35 ppm. Since 2023 we've run twelve of these for hospitals.