Project Falcon download

It simulates air flow around vehicles, buildings, outdoor equipment etc.
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Download from the developer's website

Alternative software

Pixelplan - Flow Architect Studio 3D
Pixelplan
rating

Enables you to design and visualize in 3D any scene you need.

Tunnel Assistant
Tunnel Assistant
rating

This software is built for the empirical design of underground openings.

Project Dalton
Project Dalton
rating

Program to analyze complex piping systems and distribution networks.

C-Tunnel
C-Tunnel
rating

Program dedicated to the pre-design of underground structures.

World Wind Java KML Viewer
World Wind Java KML Viewer
Free
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KML Layer and Viewer software written in java for for World Wind.