functionNusseltFreeConvection_verticalSurface
Function for calculating the nusselt number
Extends from TransiEnt.Basics.Icons.Function.
Information
1. Purpose of model
Evaluates the Nusselt Correlation for Natural Convection Heat Transfer at rectangular vertical surfaces.
2. Level of detail, physical effects considered, and physical insight
(Description)
3. Limits of validity
L (characteristic lenght) must be height of surface
10^-1 < Ra < 10^12
10^-3 < Pr
4. Interfaces
(none)
5. Nomenclature
Ra := Rayleigh number,
Pr := Prandtl number
Nu := Nusselt number
6. Governing Equations
Nu := (0.825 + 0.387 (Ra *f_1(Pr))^{1/6})^2
7. Remarks for Usage
use together with functions calculating correct Rayleigh and Prandtl numbers
8. Validation
(no validation or testing necessary)
9. References
[1] Klan, H., & Thess, A. (2013). F2 Wärmeübertragung durch freie Konvektion: Außenströmung. In VDI-Wärmeatlas (pp. 757-764). Springer Vieweg, Berlin, Heidelberg.
10. Version History
Created by Philipp Jahneke (philipp.koziol@tuhh.de), Aug 2018
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.RayleighNumber | Ra | Rayleight number calculated with properties of medium | |
| Modelica.Units.SI.PrandtlNumber | Pr | Prandtl number (property of medium) |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.NusseltNumber | Nu | Nusselt Number calculated by the correlation |