What are the factors that affect the coefficient of discharge?

What are the factors that affect the coefficient of discharge?

The discharge coefficient can vary significantly from the basic broad-crested value of 1.705 and depends largely on the geometry of the crest, but it is also a function of the depth and velocity of the approach flow.

How the discharge coefficient can be increased?

Properties of coefficient of discharge It can be increased by lowering the convergent angle in flow measurement. It can also be increased when the pressure of working fluid is enhanced.

What is a typical coefficient of discharge?

A discharge coefficient cd = 0.975 can be indicated as standard, but the value varies noticeably at low values of the Reynolds number.

What is the significance of discharge coefficient?

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 …

On which of the factors does the coefficient of bend in a pipe depend?

Explanation: Explanation: The co-efficent of bend in a pipe depends on all the three parameters – radius of curvature of the bend, diameter (radius) of the pipe and angle of bend.

On what factors coefficient of velocity depends?

CRITICAL VELOCITY : The critical velocity is that velocity of liquid flow, up to which its flow is streamlined (laminar)& above which its flow becomes turbulent. It’s denoted by Vc & it depends upon: Coefficient of viscosity of liquid (η) Density of liquid. Radius of the tube.

How does the discharge coefficient vary with the flow rate?

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.

How do you find the coefficient of discharge?

The discharge coefficient of an orifice or nozzle is defined as the ratio of the actual to theoretical flow rate:

1. Cd=Measured Flow RateTheoretical Flow Rate (1)
2. η=σΔp12ρ¯V2 (6)
3. ξ=σΔp¯Δp (7)

Which of the factors primarily decide whether the flow in a circular pipe is laminar or turbulent?

Which of the factors primarily decide whether the flow in a circular pipe is laminar or turbulent? Explanation: High Reynolds number flows (> 4000) are turbulent flows, whereas low Reynolds number flows (< 2100) are laminar flows.

Which among the following does not depend on the friction factor?

1. Which among the following does not depend on the friction factor? Explanation: The friction factor(f) depends on the velocity of flow, fluid density, pipe diameter and the viscosity of the pipe. Roughness of the pipe is also an important criteria to determine the friction factor.

What is the range of coefficient of discharge of Venturimeter?

0.61 to 0.79.

What does critical velocity depend on?

The speed and direction in which the flow of a liquid changes from through tube smooth to turbulent is known as the critical velocity of the fluid. There are multiple variables on which the critical velocity depends, but whether the flow of the fluid is smooth or turbulent is determined by the Reynolds number. 2.

What is discharge coefficient?

The Discharge Coefficient is used to model the relationship between flow and headloss through the valve being modeled (TCV, tank float valve, etc) The value to enter depends on the valve, which may be obtained from the manufacturer. Note that there are many definitions of the term “discharge coefficient” ( example ).

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 affects the discharge coefficient of an orifice orifice?

The study also found that the discharge coefficient decreased as the height above the floor was increased, up to a certain point. Another factor found to affect the discharge coefficient was the orifice diameter to riser diameter, or dD ratio.

What is the typical discharge coefficient of a broad crest?

The discharge coefficient can vary significantly from the basic broad-crested value of 1.705 and depends largely on the geometry of the crest, but it is also a function of the depth and velocity of the approach flow.