Nusselt number Nu = alpha*D/lambda
function HeatTransferCoeffient extends Modelica.Icons.Function; input SI.NusseltNumber Nu "Nusselt number"; input SI.Length D "Characteristic dimension"; input SI.ThermalConductivity lambda "Thermal conductivity"; output SI.CoefficientOfHeatTransfer alpha "Coefficient of heat transfer"; end HeatTransferCoeffient;