CubicInterpolation_lambdaCubic Hermite spline interpolation of the modified friction coefficient in transition regime of the Moody diagram (direct formulation) |
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Syntax
lambda2 = CubicInterpolation_lambda(Re, Re1, Re2, Delta);
Description
Function CubicInterpolation_lambda(..) approximates the modified friction coefficient
lambda2=lambda*Re^2 in the transition regime between laminar and turbulent flow
of the Moody diagram by a (direct) cubic Hermite spline interpolation.
See
Modelica.Fluid.UsersGuide.ComponentDefinition.WallFriction (especially Region 2)
for a detailed explanation.
Syntax
Inputs (4)
| Re |
Type: ReynoldsNumber Description: Reynolds number (= independent variable) |
|---|---|
| Re1 |
Type: ReynoldsNumber Description: Boundary Reynolds number for laminar regime |
| Re2 |
Type: ReynoldsNumber Description: Boundary Reynolds number for turbulent regime |
| Delta |
Type: Real Description: Relative roughness |
Outputs (1)
| lambda2 |
Type: Real Description: Interpolated modified friction coefficient in transition regime |
|---|