Input the known parameters such as the equivalent diameter De(m) of the spiral channel, the thermal conductivity λ(W/m·℃) of the medium, the Reynolds number Re, the Prandtl number Pr, the diameter d(m) of the central tube, the outer diameter D0(m) of the spiral body, etc., and click the calculation button to quickly calculate the average diameter Dm(m) of the spiral channel, the heat transfer coefficient α and other results.
It is generally believed that: Re 2300 is a laminar state, Re=2300-4000 is a transitional state, Re 4000 is a turbulent state, and Re 10000 is a completely turbulent state (in practice, Re>3000 can be judged as turbulent).