This information is part of the Modelica Standard Library maintained by the Modelica Association.

Calculation of the mean convective heat transfer coefficient kc for the air-side heat transfer of heat exchangers with round tubes and several fin geometries. Note that additionally a failure status is observed in this function to check if the intended boundary conditions are fulfilled. See more information .

(kc, Pr, Re, Nu, failureStatus) = kc_roundTube(IN_con, IN_var)

IN_con	Type: kc_roundTube_IN_con Description: Input record for function kc_roundTube
IN_var	Type: kc_roundTube_IN_var Description: Input record for function kc_roundTube

kc	Type: CoefficientOfHeatTransfer (W/(m²⋅K)) Description: Convective heat transfer coefficient
Pr	Type: PrandtlNumber Description: Prandtl number
Re	Type: ReynoldsNumber Description: Reynolds number
Nu	Type: NusseltNumber Description: Nusselt number
failureStatus	Type: Real Description: 0== boundary conditions fulfilled | 1== failure >> check if still meaningful results

2016-04-11 Stefan Wischhusen: Removed singularity for Re at zero mass flow rate.