This component defines only the quadratic turbulent regime of wall friction: dp = k*m_flow*|m_flow|, where "k" depends on density and the roughness of the pipe and is no longer a function of the Reynolds number. This relationship is only valid for large Reynolds numbers.
In UsersGuide the complete friction regime is illustrated. This component describes only the asymptotic behaviour for large Reynolds numbers, i.e., the values at the right ordinate where λ is constant.
Name | Description |
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![]() | Return mass flow rate m_flow as function of pressure loss dp, i.e., m_flow = f(dp), due to wall friction |
![]() | Return pressure loss dp as function of mass flow rate m_flow, i.e., dp = f(m_flow), due to wall friction |
![]() | 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 |
![]() | 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 |
Inherited | |
use_mu=true | = true, if mu_a/mu_b are used in function, otherwise value is not used |
use_roughness=true | = true, if roughness is used in function, otherwise value is not used |
use_dp_small=true | = true, if dp_small is used in function, otherwise value is not used |
use_m_flow_small=true | = true, if m_flow_small is used in function, otherwise value is not used |
dp_is_zero=false | = true, if no wall friction is present, i.e., dp = 0 (function massFlowRate_dp() cannot be used) |
use_Re_turbulent=true | = true, if Re_turbulent input is used in function, otherwise value is not used |
Name | Description |
---|---|
dp | Pressure loss (dp = port_a.p - port_b.p) [Pa] |
rho_a | Density at port_a [kg/m3] |
rho_b | Density at port_b [kg/m3] |
mu_a | Dynamic viscosity at port_a (dummy if use_mu = false) [Pa.s] |
mu_b | Dynamic viscosity at port_b (dummy if use_mu = false) [Pa.s] |
length | Length of pipe [m] |
diameter | Inner (hydraulic) diameter of pipe [m] |
roughness | Absolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m] |
dp_small | Regularization of zero flow if |dp| < dp_small (dummy if use_dp_small = false) [Pa] |
Re_turbulent | Turbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1] |
Name | Description |
---|---|
m_flow | Mass flow rate from port_a to port_b [kg/s] |
Name | Description |
---|---|
m_flow | Mass flow rate from port_a to port_b [kg/s] |
rho_a | Density at port_a [kg/m3] |
rho_b | Density at port_b [kg/m3] |
mu_a | Dynamic viscosity at port_a (dummy if use_mu = false) [Pa.s] |
mu_b | Dynamic viscosity at port_b (dummy if use_mu = false) [Pa.s] |
length | Length of pipe [m] |
diameter | Inner (hydraulic) diameter of pipe [m] |
roughness | Absolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m] |
m_flow_small | Regularization of zero flow if |m_flow| < m_flow_small (dummy if use_m_flow_small = false) [kg/s] |
Re_turbulent | Turbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1] |
Name | Description |
---|---|
dp | Pressure loss (dp = port_a.p - port_b.p) [Pa] |
Name | Description |
---|---|
dp | Pressure loss (dp = port_a.p - port_b.p) [Pa] |
rho_a | Density at port_a [kg/m3] |
rho_b | Density at port_b [kg/m3] |
mu_a | Dynamic viscosity at port_a (dummy if use_mu = false) [Pa.s] |
mu_b | Dynamic viscosity at port_b (dummy if use_mu = false) [Pa.s] |
length | Length of pipe [m] |
diameter | Inner (hydraulic) diameter of pipe [m] |
g_times_height_ab | Gravity times (Height(port_b) - Height(port_a)) |
roughness | Absolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m] |
dp_small | Regularization of zero flow if |dp| < dp_small (dummy if use_dp_small = false) [Pa] |
Re_turbulent | Turbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1] |
Name | Description |
---|---|
m_flow | Mass flow rate from port_a to port_b [kg/s] |
Name | Description |
---|---|
m_flow | Mass flow rate from port_a to port_b [kg/s] |
rho_a | Density at port_a [kg/m3] |
rho_b | Density at port_b [kg/m3] |
mu_a | Dynamic viscosity at port_a (dummy if use_mu = false) [Pa.s] |
mu_b | Dynamic viscosity at port_b (dummy if use_mu = false) [Pa.s] |
length | Length of pipe [m] |
diameter | Inner (hydraulic) diameter of pipe [m] |
g_times_height_ab | Gravity times (Height(port_b) - Height(port_a)) |
roughness | Absolute roughness of pipe, with a default for a smooth steel pipe (dummy if use_roughness = false) [m] |
m_flow_small | Regularization of zero flow if |m_flow| < m_flow_small (dummy if use_m_flow_small = false) [kg/s] |
Re_turbulent | Turbulent flow if Re >= Re_turbulent (dummy if use_Re_turbulent = false) [1] |
Name | Description |
---|---|
dp | Pressure loss (dp = port_a.p - port_b.p) [Pa] |