The Drag Coefficient on Kinder's Egg Container

Introduction Our team, known as the "Kinder", decided to estimate the drag coefficient of the Kinder egg container, very similar to the cylinder. In particular, the cylinder experiences a flow in its plane. Its drag coefficient is measured by air flow. Airflow is supplied by a regular blower. The speed of the wind speed is measured by an anemometer and we build our own anemometer with plastic cups, pencils, instant materials like needles and straws.

The drag coefficient is a dimensionless quantity used to quantify the resistance or resistance of an object in a fluid. The smaller the drag coefficient, the smaller the aerodynamic or hydrodynamic drag of the object is. The drag coefficient is always associated with a specific surface area. The drag coefficient of any object combines the effect of shape resistance and friction between the object and the particles in the fluid. This is obtained experimentally by measuring the drag to the object and defining A as the area under consideration. (Chanson, 2009)

To represent the amount of drag on the object, use a value called a drag coefficient (cd). This number depends not only on the shape of the object but also on other factors such as speed and surface roughness, air density, and whether the flow is laminar (smooth) or turbulent. Forces affecting resistance include pneumatic pressure on the surface of the object, friction along the side of the object, and relative negative pressure or suction on the object's back. For example, the cd of the plate moving upward by air is about 1.3, the cube with the face up is about 1, the sphere is about 0.5, and the shape of the teardrop is about 0.05 . The modern drag coefficient is 0.25 to 0.35, and the aircraft drag coefficient is 0.01 to 0.03. Calculation of cd can be complicated. Therefore, it is usually determined by computer simulation or wind tunnel experiment.

The drag coefficient (Cd) is the general publicized level of the aerodynamic smoothness of a car and is related to the shape of the car. Please hang Cd on the front of the car to get total resistance index. The result is called the drag area, and several cars are listed below. The width and height of the curved car leads to overestimation of the front part. Unless otherwise stated, these numbers use the Mayfield manufacturer's positive area specification. Traction area figures do not reflect drag coefficient and frontal area data of independent aerodynamic tests indicated by an asterisk (*) (eg based on the manufacturer's reported numerical value or educational speculative resistance area ).