Channel $—$ Basic model for channel geometry

The Channel component calculates the pressure loss for flow through different geometries. The component takes into consideration surface roughness.

Connections

 Name Description Modelica ID ${\mathrm{port}}_{A}$ Layout of port where oil flows into an element ($0<{m}_{\mathrm{flow}}$, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_A ${\mathrm{port}}_{B}$ Hydraulic port where oil leaves the component (${m}_{\mathrm{flow}}<0$, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_B $\mathrm{oil}$ oil

Parameters

General Parameters

 Name Default Units Description Modelica ID ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system

Hydraulic Resistance Parameters

 Name Default Units Description Modelica ID $\mathrm{geometry}$ [1] Choice of geometry for internal flow geometry $K$ $0$ $m$ Roughness (average height of surface asperities) K $L$ $1$ $m$ Length L ${d}_{\mathrm{ann}}$ ${d}_{\mathrm{cir}}$ $m$ Small diameter d_ann ${\mathrm{D}}_{\mathrm{ann}}$ $2{d}_{\mathrm{ann}}$ $m$ Large diameter D_ann ${d}_{\mathrm{cir}}$ $0.01$ $m$ Internal diameter d_cir ${a}_{\mathrm{ell}}$ $\frac{3}{4}{d}_{\mathrm{cir}}$ $m$ Half length of long base line a_ell ${b}_{\mathrm{ell}}$ $\frac{1}{2}{a}_{\mathrm{ell}}$ $m$ Half length of short base line b_ell ${a}_{\mathrm{rec}}$ ${d}_{\mathrm{cir}}$ $m$ Horizontal length a_rec ${b}_{\mathrm{rec}}$ ${a}_{\mathrm{rec}}$ $m$ Vertical length b_rec ${a}_{\mathrm{tri}}$ ${d}_{\mathrm{cir}}\left(1+\sqrt{2}\right)$ $m$ Length of base line a_tri ${h}_{\mathrm{tri}}$ $\frac{1}{2}{a}_{\mathrm{tri}}$ $m$ Height to top angle perpendicular to base line h_tri $\mathrm{\beta }$ [2] $\mathrm{rad}$ Top angle beta

[1] $\mathrm{Modelica.Fluid.Dissipation.Utilities.Types.GeometryOfInternalFlow.Circular}$

[2] $\frac{1}{2}\mathrm{\pi }$