![During the transition testing of a model of the Space Launch System, engineers used a technique called smoke flow visualization.](https://www.nasa.gov/wp-content/uploads/2023/03/smoke_test_7.jpg)
Smoke Flow Visualization for SLS
During the liftoff transition testing of a SLS model, engineers used a technique for studying airflow streamlines called smoke flow visualization.
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https://www.nasa.gov/image-detail/smoke-flow-visualization-sls/
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