The Venturi effect, also known as the Venturi effect. This phenomenon is named after its discoverer, the Italian physicist Giovanni Battista Venturi. This effect is manifested when the restricted flow passes through the narrowed flow section. The flow velocity of the fluid increases, and the flow velocity is inversely proportional to the flow section. And according to Bernoulli's law, the increase of flow velocity is accompanied by the decrease of fluid pressure. That is, the common Venturi phenomenon. In layman's terms, this effect means that a low pressure will be generated near a fluid flowing at a high speed, resulting in adsorption. Using this effect, a venturi can be made.