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  1. Smoke is a common technique for visualizing and testing air flow123. Smoke can be generated by different methods, such as smoke pens4, sulfuric acid tubes5, smoke candles2, or smoke pellets2. Smoke can be used to pinpoint air leaks4, measure air volume2, check air flow units2, and determine ventilation3. Smoke is usually mixed with air to create visible white smoke that is carried by the air flow52.
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    Two of the oldest flow visualization techniques are the use of smoke and tufting. The figure shows smoke flow and tufts being used on the NASA Dryden F-18 flight vehicle, but the techniqes are used more often in wind tunnel testing. Smoke is used to visualize the flow that is away from the surface of the model.

    Smoke and Tuft Flow Visualization - NASA

    www.grc.nasa.gov/WWW/k-12/airplane/tunvsmoke.…

    Generally, one part of smoke to two or more parts of air volume provides satisfactory results. #1A and #2B smoke candles are recommended for checking air flow units such as exhaust fans and Smoke Pellets are recommended for smaller applications such as exhaust hoods and ductwork.

    Airflow Study with Superior Smoke Gener…

    superiorsignal.com/your-smoke-application/airflow …
    A smoke test is a simple way to determine if your attic ventilation is working properly. The test involves a few steps to help locate air leaks and determine the amount of existing ventilation. When your roof and soffit vents work in unison, hot air is removed, fresh air comes in, and airflow is created.

    How to Do a Smoke Test to Check Attic …

    www.angi.com/articles/check-your-attic-ventilation …
    The smoke pen is a simple test tool used to pinpoint air leaks. It has a wick that is lit on fire with a lighter or match. Once the wick has burned for a few seconds, you blow out the flame and allow the wick to smoke. The smoke lasts only a few minutes; when the the pen stops smoking, you will have to re-light the wick.

    Using Smoke to Find Air Leaks - GreenBu…

    www.greenbuildingadvisor.com/article/using-smok…
    Smoking sulfuric acid is located in the tubes. When the top of the tube is opened, a small rubber ball is used to pump air through the tube. This creates visible white smoke, which is carried on any existing air flows.

    Dräger Air Flow Tester | Draeger

    www.draeger.com/en_uk/Products/Air-Flow-Tester
     
  3. Superior Signal Company LLC
    https://superiorsignal.com › your-smoke-application › airflow-study

    Airflow Study with Superior ® Smoke

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  4. microrite.com
    https://www.microrite.com › wp-content › uploads
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    CONDUCTING AIRFLOW VISUALIZATION STUDIES: METHODS …