Description

This calculation determines the outlet velocities and velocity gradients in distribution ducts, considering the inlet flow and system geometry.

Input and Output Parameters

Inputs

Parameter	Standard Units	Description
Water temperature (TC)	°C	Water temperature in the system
Incoming flow (Q)	L/s	Flow rate entering the distribution system
Number of settling tanks in parallel (N)	-	Number of settling tanks operating simultaneously
Distribution duct upstream internal height (hu)	m	Internal height of the upstream distribution duct
Distribution duct internal width (b)	m	Internal width of the distribution duct
Distribution duct downstream internal height (hd)	m	Internal height of the downstream distribution duct
Roughness of pipe inner surface (k)	mm	Roughness of the internal pipe surface
Number of distribution tees (Ntee)	-	Total number of distribution tees
Distribution tee diameter (Dtee)	mm	Internal diameter of the distribution tees

Outputs

Parameter	Standard Units	Description
Upstream velocity in the distributor (vu)	m/s	Water velocity in the distribution duct before distribution
Upstream velocity gradient (Gu)	s⁻¹	Velocity gradient in the upstream duct
Downstream velocity in the distributor (vd)	m/s	Water velocity in the distribution duct after distribution
Downstream velocity gradient (Gd)	s⁻¹	Velocity gradient in the downstream duct
Velocity in the distribution tees (vtee)	m/s	Water velocity in the distribution tees
Velocity gradient in the distribution tees (Gtee)	s⁻¹	Velocity gradient in the distribution tees