Street Science Season 1 Episode 5 Fire Vortex

In Street Science season 1 episode 5, titled "Fire Vortex," host Kevin Delaney and his team explore the science behind a phenomenon known as a fire vortex. Often seen in wildfires, fire whirls or fire tornadoes are created when hot air rises rapidly and meets cooler air. As a result, it begins to rotate, creating a vertical column of fire and ash that can be very dangerous.

To better understand how fire vortexes work, Kevin and his team set up a series of experiments. In the first experiment, they visit a cornfield and set it on fire. By controlling the wind direction and speed, they are able to create a fire vortex. Kevin explains that the rotating column of fire can easily spread the fire in unpredictable directions, making it difficult for firefighters to control the blaze.

Next, the team travels to a burn pit to observe how different types of fuel can affect the size and intensity of a fire vortex. By adding ping pong balls to the fire, they are able to create a larger and more visible vortex than before.

In another experiment, Kevin and his team attempt to create a fire vortex using a homemade cannon. By igniting a propane mixture in the cannon, they generate a massive fireball that creates a small fire vortex. Kevin demonstrates how the velocity of the burning gases inside the cannon generates the rotation necessary to create the vortex.

Finally, Kevin and his team try something completely different by creating a fire vortex using sound waves. They set up a large speaker facing a fire pit and play a sequence of oscillating sound waves. To their surprise, they are able to generate a small fire vortex. Kevin explains that the sound waves create alternating areas of high and low pressure, which creates the necessary rotation to create the vortex.

Throughout the episode, Kevin provides clear and concise explanations for the science behind each experiment. He also emphasizes the potential dangers of fire vortexes and the importance of understanding how they work. By the end of the episode, viewers will have a greater appreciation for the power of fire and the fascinating science behind it.