Changes between Version 28 and Version 29 of doc/tec/bc

Timestamp:

May 12, 2016 8:47:12 AM (9 years ago)

Author:

Giersch

Comment:

--

doc/tec/bc

@@ -229 +229 @@
 \end{align*}
 }}}
-with ''D'' being the length of the relaxation region and ''F'',,inlet,, being a damping factor.
+with ''D'' being the length of the relaxation region and ''F'',,inlet,, being a damping factor. For more information about the inflow boundary see Sect. [wiki:/doc/tec/noncyclic#Inflowboundary inflow boundary]. 
+
 
 == Turbulence recycling ==
@@ -275 +276 @@
 \end{align*}
 }}}
-that is calculated at interior grid points next to the outlet at the preceding time step for each velocity component. If the transport velocity, calculated by means of the equation for the transport velocity, is outside the range ''0 ≤ U,,ui,, ≤ '''Δ'''/Δt'', it is set to the respective threshold value that is exceeded. Because this local determination of ''U,,ui,,'' can show high variations in case of complex turbulent flows, it is averaged laterally to the direction of the outflow, so that it varies only in the vertical direction. Alternatively, the transport velocity can be set to the upper threshold value (''U,,ui,, = '''Δ'''/Δt'') for the entire outlet. Both equations mentioned in this section are discretized using an upstream method following [#miller1981 Miller and Thorpe (1981)]. As the radiation boundary condition does not ensure conservation of mass, a mass flux correction can be applied at the outlet.
+that is calculated at interior grid points next to the outlet at the preceding time step for each velocity component. If the transport velocity, calculated by means of the equation for the transport velocity, is outside the range ''0 ≤ U,,ui,, ≤ '''Δ'''/Δt'', it is set to the respective threshold value that is exceeded. Because this local determination of ''U,,ui,,'' can show high variations in case of complex turbulent flows, it is averaged laterally to the direction of the outflow, so that it varies only in the vertical direction. Alternatively, the transport velocity can be set to the upper threshold value (''U,,ui,, = '''Δ'''/Δt'') for the entire outlet. Both equations mentioned in this section are discretized using an upstream method following [#miller1981 Miller and Thorpe (1981)]. As the radiation boundary condition does not ensure conservation of mass, a mass flux correction can be applied at the outlet (see [wiki:/doc/tec/noncyclic#Massfluxcorrection mass flux correction]). For more information about the outflow boundary see Sect. [wiki:/doc/tec/noncyclic#Outflowboundary outflow boundary].
+
 
 == Topography ==