Reynolds Number Calculator

According to the definition of Reynolds number, there is Re=ρv^2/(ηv/l), it can be seen that the numerator of the above formula represents the fluid momentum passing through a unit area in a unit time, that is, the size of the fluid inertial force; and the v/ in the denominator l represents the velocity gradient, so the Reynolds number reflects the ratio of the inertial force to the viscous force of the fluid particle. The flow state of the fluid can be judged by calculating the Reynolds number, which is very important for the calculation of the resistance along the way and the heat transfer coefficient.