minor_losses: Minor Losses

In ratral/wcontrolvalve: Meta Analysis Plunger Valves

Description

Although they often account for a major portion of the head loss, especially in process piping, the additional losses due to entries and exits, fittings and valves are traditionally referred to as minor losses. These losses represent additional energy dissipation in the flow, usually caused by secondary flows induced by curvature or recirculation. The minor losses are any head loss present in addition to the head loss for the same length of straight pipe. allows for easy integration of minor losses into the Darcy-Weisbach equation. Zeta is the sum of all of the loss coefficients in the length of pipe, each contributing to the overall head loss. Although Zeta appears to be a constant coefficient, it varies with different flow conditions. Factors affecting the value of K include: the exact geometry of the component in question; the flow Reynolds Number; proximity to other fittings, etc. (Tabulated values of K are for components in isolation - with long straight runs of pipe upstream and downstream.)

Usage

minor_losses(flow, dn, zeta)

Arguments

flow	cubic meter per second (m3/s)
dn	inner diameter of pipe (m)
zeta	loss coefficient

Value

minor losses in meter

Examples

 minor_losses( flow = 0.042,
                dn = 0.150,
                zeta = 3)

ratral/wcontrolvalve documentation built on Nov. 26, 2020, 11:18 p.m.