# Blog

## What do you mean of coefficient of discharge? chegg.com
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid from the same initial conditions to the same exit pressures.

## What affects discharge coefficient?

Discharge coefficient has been shown to reduce with increasing wave amplitude and wave time period. Ingress and egress of floodwater has been modelled using the mean discharge coefficient during the flood.

## What is the coefficient of discharge for a Venturi meter?

The effective discharge coefficient for venturi meters ranges from 0.9 to about unity (Streeter, 1951; American Society of Mechanical Engineers, 1983) with turbulent flow, and it varies with diameter ratio of throat to pipe.

## Is discharge coefficient a constant?

Unlike the flow coefficient, discharge coefficient is dimensionless and almost constant value for any diameter of a single model. ... For the same high of fluid in the reservoir, higher is the discharge coefficient, higher is the flow rate, therefore the reservoir can be voided at shorter time.

## Why coefficient of discharge is always less than 1?

Coefficient of discharge (Cd): It is the ratio of actual discharge to theoretical discharge. As in a pipe, frictional losses are presents therefore Qactual will always be less than Qtheoretical. Its value is always less than 1.

## Why do the discharge coefficients differ from unity?

The discharge coefficient differs from unity due to the nonuniformity of flow parameters (such as Mach number) at the nozzle exit and presence of boundary layer (viscous effect).

## What is the maximum value of coefficient of discharge?

0.61 to 0.79. 0.72 to 0.89.

## Why is the discharge coefficient important?

This parameter is useful for determining the irrecoverable losses associated with a certain piece of equipment (constriction) in a fluid system, or the "resistance" that piece of equipment imposes upon the flow.

## What is the practical importance of coefficient of discharge and coefficient of velocity?

The coefficients of velocity and discharge are necessary to accurately predict flow rates from orifices.

## Why discharge coefficient is high in Venturi meter than orifice meter?

In Venturi meter losses are less so coefficient of discharge is higher whereas in orifice meter due to no convergent and divergent cones there are more losses and hence its coefficient of discharge is less.In venturi meter losses are low due to steamline shape of the diffuser and the pressure gradient is not abrupt as ...Nov 16, 2017  ### How do you calculate CD on CV?

Coefficient of discharge (Cd) = Coeff. of flow/velocity (Cv) x Coeff of contraction (Cc). If you know coeff.

### What does coefficient tell us?

• The correlation coefficient is a statistical calculation that is used to examine the relationship between two sets of data. The value of the correlation coefficient tells us about the strength and the nature of the relationship. Correlation coefficient values can range between +1.00 to -1.00.

### What is the effect of a discharge?

• A discharge also prohibits creditors from communicating with debtors regarding the discharged debt. A bankruptcy discharge releases the debtor from certain specific debts known as dischargeable debts. The effect of a discharge, is that it frees the debtor from the debts he or she incurred before the bankruptcy order.

### What is characteristic of coefficient?

• Characteristic coefficient. These coefficients are derived from the physical quantities according to the affinity laws. The characteristic coefficients are dimensionless numbers used to perform the quantitative or qualitative evaluation of a condition.

### What is discharge equation?

• Discharge Equation Simplest description of flow in a channel is that the volume rate of flow (discharge) is constant, assuming no tributaries are encountered Volume balance gives us the Discharge or Continuity Equation: (2) for measurement procedure, see Stream Gauging notes

### Why does the discharge coefficient come into the equation above?Why does the discharge coefficient come into the equation above?

The discharge coefficient comes into the equation above because the flow rate, Q, is the theoretical flow rate assuming incompressible isentropic flow. The discharge coefficient is the ratio of the actual flow to the theoretical flow:

### What is the discharge coefficient of a nozzle?What is the discharge coefficient of a nozzle?

Discharge coefficient. In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge) is the ratio of the actual discharge to the theoretical discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid...

### What is disdischarge coefficient?What is disdischarge coefficient?

Discharge coefficient. , pressure drop across constriction (force per area). This parameter is useful for determining the irrecoverable losses associated with a certain piece of equipment (constriction) in a fluid system, or the "resistance" that piece of equipment imposes upon the flow. This flow resistance, often expressed as a dimensionless...

### What is the meaning of P1 KD in discharge coefficient?What is the meaning of P1 KD in discharge coefficient?

P1 = upstream relieving pressure (psig) Kd = rated discharge coefficient (dimensionless) = C d = (actual flow rate) / (ideal flow rate) Kw = correction factor for backpressure ( = 1 if discharging to atmosphere or if backpressure is less than 50% of inlet pressure)