modelMacDonald
Empirical correlation according to MacDonald et al
Extends from TransiEnt.Storage.Heat.PackedBedStorage_L4.Basics.PackedBedPressureLoss.PressureLossBasePackedBed (Base model for pressure loss in packed beds).
Information
1. Purpose of model
Empirical Correlation for packed bed pressure loss according to Macdonald et al.
2. Level of detail, physical effects considered, and physical insight
(Description)
3. Limits of validity
(Description)
4. Interfaces
(none)
5. Nomenclature
(no elements)
6. Governing Equations
(no equations)
7. Remarks for Usage
(none)
8. Validation
(no validation or testing necessary)
9. References
I.F. Macdonald, M.S. El-Sayed, K. Mow, F.A.L. Dullien, Flow through Porous Media-the Ergun Equation Revisited, Ind. Eng. Chem. Fund. 18 (1979) 199–208.
10. Version History
Model created by Michael von der Heyde (heyde@tuhh.de), March 2021
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Pressure | Delta_p_smooth (from PressureLossBasePackedBed) | iCom.Delta_p_nom/iCom.N_cv*0.2 | |Small Mass Flows|For pressure losses below this value the square root of the quadratic pressure loss model is regularised |
| ClaRa.Basics.Units.Length[iCom.N_cv] | Delta_x (from PressureLossBasePackedBed) | geo.Delta_x | |
| ClaRa.Basics.Units.Length[iCom.N_cv + 1] | Delta_x_FM (from PressureLossBasePackedBed) | geo.Delta_x_FM | flowModel grid |
| ClaRa.Basics.Units.MassFlowRate | m_flow_nom (from PressureLossBasePackedBed) | iCom.m_flow_nom | Nominal mass flow rate |
| ClaRa.Basics.Units.PressureDifference | Delta_p_nom (from PressureLossBasePackedBed) | iCom.Delta_p_nom | Nominal pressure loss wrt. all parallel tubes |
| ClaRa.Basics.Units.Area | A_cross_bed_FM (from PressureLossBasePackedBed) | geo.A_cross_bed_FM | Cross Area of Packed Bed |
| Boolean | frictionAtInlet (from PressureLossBasePackedBed) | ||
| Boolean | frictionAtOutlet (from PressureLossBasePackedBed) | ||
| Boolean | useHomotopy (from PressureLossBasePackedBed) | ||
| ClaRa.Basics.Units.Area | permeability | 2*iCom.porosity*iCom.d_h^2/217 |