Venturino: analysis of pressure variation in a Venturi's tube using Arduino and pressure sensor

Abstract Usually, didactic labors inside schools and inside institutions which offers Physics graduations or related areas does not have equipments or experimental practice about hydrodynamics theme. Important technological applies like Pitot or Venturi tubes are considered only from mathematics perspectives without connection between industry or technological fields and the developed theory. This paper proposes a Venturi tube construction using low cost materials to solve at least in part the lack of hydrodynamics experimental practices. The tube is connected to model BMP280 pressure sensors controlled by a microcontroller board arduino. The apparatus allows to print graphics, created in real time, about how pressure changes at a fixed point over time and establish empirics links between pressure, fluid speed and tube area. It had done in technical courses from CEFET/Valença and in an experimental Physics course which composes the Food Engineering grade. This experiment is inside a project that aims to create didactic resources to develop teaching activities supported by learning activities concepts through Predict -- Observe -- Explain method (POE).