packageLaminar
Extends from PartialWallFriction (Partial wall friction characteristic (base package of all wall friction characteristics)).
Information
This component defines only the laminar region of wall friction: dp = k*m_flow, where "k" depends on density and dynamic viscosity. The roughness of the wall does not have an influence on the laminar flow and therefore argument roughness is ignored. Since this is a linear relationship, the occurring systems of equations are usually much simpler (e.g., either linear instead of non-linear). By using nominal values for density and dynamic viscosity, the systems of equations can still further be reduced.
In UsersGuide the complete friction regime is illustrated. This component describes only the Hagen-Poiseuille equation.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Boolean | use_mu (from PartialWallFriction) | true | = true, if mu_a/mu_b are used in function, otherwise value is not used |
| Boolean | use_roughness (from PartialWallFriction) | true | = true, if roughness is used in function, otherwise value is not used |
| Boolean | use_dp_small (from PartialWallFriction) | true | = true, if dp_small is used in function, otherwise value is not used |
| Boolean | use_m_flow_small (from PartialWallFriction) | true | = true, if m_flow_small is used in function, otherwise value is not used |
| Boolean | dp_is_zero (from PartialWallFriction) | false | = true, if no wall friction is present, i.e., dp = 0 (function massFlowRate_dp() cannot be used) |
| Boolean | use_Re_turbulent (from PartialWallFriction) | true | = true, if Re_turbulent input is used in function, otherwise value is not used |
Contents
| Name | Description |
|---|---|
 massFlowRate_dp | Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction |
 pressureLoss_m_flow | Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction |
 massFlowRate_dp_staticHead | Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction and static head |
 pressureLoss_m_flow_staticHead | Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction and static head |