What is energy per unit mass?
Specific energy or massic energy is energy per unit mass. It is also sometimes called gravimetric energy density, or just energy density though energy density more precisely means energy per unit volume. The SI unit for specific energy is the joule per kilogram (J/kg).
What is total energy in fluid mechanics?
It is the energy possessed by a liquid by virtue of its height above the ground level. Total energy of the liquid in motion = pressure energy + kinetic energy + potential energy. area of cross section, v1 and v2 be the velocity of flow of the liquid at A and B respectively.
What is the kinetic energy per unit mass of liquid?
∴ Kinetic energy of liquid per unit mass =mK=21v2.
Which of the following energies are part of the total energy of a flowing fluid?
The total energy of a flowing fluid consists of internal, kinetic and potential energies.
What are the different forms of energy in a flowing fluid?
A flowing liquid has three types of energies:
- Pressure Energy.
- Kinetic Energy.
- Potential Energy.
What is flow rate equal to?
Figure 1. Flow rate is the volume of fluid per unit time flowing past a point through the area A. Here the shaded cylinder of fluid flows past point P in a uniform pipe in time t. The volume of the cylinder is Ad and the average velocity is ¯¯¯v=d/t v ¯ = d / t so that the flow rate is Q=Ad/t=A¯¯¯v Q = Ad / t = A v ¯ .
Does mass flow rate change with pressure?
Flow rates and the ideal gas law The Ideal Gas Law in motion: Volumetric flow rate changes with pressure, but mass flow rate remains constant.
What is flow and pressure?
Flow is a measure of air output in terms of volume per unit of time. The common units are feet per second, metres per second, etc. Pressure is the measure of force applied on an area. The common units for pressure are pounds per square inch (PSI), Pascals (Newtons per square metre), etc./span>
How do you calculate the flow rate of a water pump?
Submersible pump flow calculation formula: 60HZ flow × 0.83 = 50HZ flow 60HZ lift × 0.69 = 50HZ lift 60HZ power ÷ 1.728 = 50HZ motor power motor output power = Q (flow) × H (head) / 367.2 / efficiency × 1.15 motor output power = shaft power × 1.15 pump efficiency = Q × H × 0.00272 / motor power Q represents flow; H …/span>
How do you calculate the discharge flow rate of a pump?
To measure the flow rate of your system you can: Use a Flow Meter: This is a simple device which can measure the amount of fluid passing through it. Attach this to your discharge pipe, as close as possible to your pump and it should give you a reliable reading of your flow rate.
How do you calculate the mass flow rate of a pump?
We can determine the value of the mass flow rate from the flow conditions. A units check gives area x length/time x time = area x length = volume. The mass m contained in this volume is simply density r times the volume. To determine the mass flow rate mdot, we divide the mass by the time.
How can I make my water flow uphill without a pump?
A siphon is a way to carry water uphill without the use of pumps. It consists of a hose full of water with one end in a water source and the other end pouring out into a destination that is below the source./span>
How do you make water flow uphill?
Gravity accelerates the water through the “down” part of the tube, into the lower cup. Because water has strong cohesive bonds, these water molecules can pull the water behind them through the uphill portion of the tube, according to Wonderopolis, a site where daily questions get answered./span>
How did Romans make water flow uphill?
Aqueducts moved water through gravity alone, along a slight overall downward gradient within conduits of stone, brick, or concrete; the steeper the gradient, the faster the flow.
How deep can a pump lift water?
33.9 feet
What size of pump do I need to lift water 50 feet?
Example – Horsepower Required to Pump Water
| Power Required to Pump Water (hp) | ||
|---|---|---|
| Volume Flow (gpm) | Height (ft) | |
| 50 | 0.0631 | 0.379 |
| 60 | 0.0758 | 0.455 |
| 70 | 0.0884 | 0.530 |