modelHr
hydraulic resistance, pipe friction
Extends from BondGraph.BG_linear.Partial_models.Port_x2.
Parameters
| Type | Name | Default | Description |
|---|
| Real | temp | 313.15 | temperature |
| Real | part_mass_air | 1.393e-6 | mass proportion of undissolved air to total mass of mixture |
| Real | e_nom | 1e6 | nominal effort |
| Real | f_nom | 1e-3 | nominal flow |
| Real | a | 3.14e-4 | cross sectional area of pipe |
| Real | l | 0.1 | length of pipe |
| Real | d_h | 0.01 | hydraulic diameter of pipe d_h |
| Real | r_h | 1e-6 | relative hydraulic roughness of pipe k/d_h |
| Real | re_min | 1e-3 | minimal reynolds number |
| Real | re_crit | 2320 | critical reynolds number |
| Real | re_range | 1e1 | reynolds number range for laminar-turulent transition |
| Real | r_min | 1e-2*e_nom/f_nom | minimal resistance |
| Real | r_max | 1e6*e_nom/f_nom | maximal resistance |
| Integer | par_caus | 2 | constitutive equation causality, par_caus=1<=>(effort out), par_caus=2<=>(flow out) |
Components
| Type | Name | Default | Description |
|---|
| BondGraph.BG_nonlinear.Media.Hlp_iso_vg_32.Hprop | hprop | | properties of fluid, model of viscosity and density |
| Real | e | | effort |
| Real | f | | flow |
| Real | r | | resistance |
| Real | eta | | viscosity |
| Real | rho | | density |
| Real | re | | reynolds number |
| Real | lambda | | hydraulic pipe friction factor |
