Flow rate Definition and 496 Threads

Hey, I was wondering how to calculate the volumetric flow rate (Q) of a liquid other than water through a hole at the bottom of a tank. I know that Q= V.A and 1/2.ρ.V^2 = ρ.g.h Where, V: Velocity of the liquid coming out of the hole A: Area of the hole h: Height of the...

I am considering the effects on volumetric and mass flow rate for two conditions: Condition 1) 1013mBar, 21C (Air density as per) Condition 2) 700mBar (10,000ft) 21C (Air density as per) Setup: A variable flow restrictor is connected to a constant source of oxygen at 50 psig. The variable...

Hi all, I am stuck on a problem, and it's been a while since I took fluid dynamics. I have a cylindrical tank of know capacity with an inlet, where a vent is attached, and an outlet, the fluid gets sucked. The tank has fluid in there with known volume and density. If I know the usage rate of...

Hi, I'm designing a system that spray water into air. I'm wondering how I should go finding out the relationship between the flow rate and distance of travel of the water droplet in air. If I am spraying the water going the same direction as the wind, how much would the velocity of the...

Homework Statement Helium gas flows through a well-insulated nozzle at steady state. The temperature and the velocity at the inlet are 550°R and 150 ft/s, respectively. At the exit, the temperature is 400°R and the pressure is 40 lbf/in2. The area of the exit is 0.0085 ft2. Using the ideal gas...

Homework Statement Air expands through a turbine from 8 bar, 960 K to 1 bar, 450 K. The inlet velocity is small compared to the exit velocity of 90 m/s, The turbine operates at a steady state and develops a power output of 2500 kW. Heat transfer between the turbine and it's surroundings and...

Homework Statement Air enters aone-inlet, one-exit contreol volume at 6 bar, 500K and 30m/s through a flow area of 28cm3. At the exit the pressure is 3 bar, the temperature is 456.5 K and the velocity is 300 m/s. The air behaves as an ideal gas. For steady state operation determine a) the...

Hello, I have a box with a hole directly connected to a blower inside. I can use the air sent by the blower to give a thrust to the box, in order to move it. I can say the the box is in a room, so open air around the box. The thrust should be 35 N and I have to calculate the pressure and the...

I have head loss (25.95ft) and converted that to pressure (17.19psi). I am trying to find flow rate in 3" sch 80 pipe coming from railcar at 25psi. So outlet pressure is 7.813psi. The fluid is 50% Caustic soda.

Hi, yesterday my dad and I were debating whether flow rate stays constant throughout a system. I told him we learned this in physics and he refused to believe it. He's a plumber so he may have thought his reasoning was more justified than mine. He finally said, "I can disprove it now" and...

I need to figure out the best way to improve drainage of spring water flowing through my property. The water from my neighbour’s spring flows 10m through a pipe into a manhole on my side. The water level in this manhole is always 10-20 cm higher than the in and out pipes. The water then flows...

I am majorly stuck, we are doing a report in which we determine the flow rate using a venturi then compare values with the flow rate from a pitot tube. So basically we have recorded pressure values with a pitot tube, moving the tube 2mm from the centre of the venturi each time and re-recording...

So that's the question and I'm stuck on Part b. I don't even know how to approach it. I know A1= 3A2 but I don't know A1 and I need V2 and I don't know V1 or A2. I'm just confused as to how to do this. Please help!

I'm not sure how to clearly express my query, so I'll round up the gist of it. I understand that this is an entry level question. I was told that, in order to calculate Volume Flow Rate (VFR), I would use these equations: * Q = Velocity * Area [EQUATION 1] * Q = Volume / Time [EQUATION 2]...

This is the question The flow of a fluid between two large flat parallel plates normal to the y direction is fully developed and steady. The plates are a distance 2h apart in the y direction and the velocity profile, assuming y=0 is at the midpoint between the plate is V(y) = V_0(1-(y/h)^2)...

Hi, Essentially what I need is a pump that will pump 40 gallons of water per hour to a height of 8 feet. Ignoring pressure losses in the lines (for now) I used the bernouli equation to determine that I need a pressure change of 3.44 psi in my pump. I found these pumps that look suitable but...

I am trying to analyse the relationship of flow rate rate through a simplex nozzle. Here is the situations. Fuel = Kerosene I have a simplex nozzle for injection. And there is a fuel pipe before the nozzle [obviously :P] The flow rate in the pipe is controlled by varying the velocity of fuel...

Homework Statement Air flows through two 8"x10" ducts that merge into a single 18"x14" duct. (Ducts are in 3D) The average speed of air in each of the 8"x10" ducts is 30 ft/s. What is the volume flow rate, of air in the 18"x14" section of the duct? Express the volume flow rate in ft^3/s...

Hello Gentlemen, Do you help me in finding flow rate calculation for diesel engine oil pump? Is anyone know procedure need follow based nominal clearance / maximum clearance? How we can find flow rate requirement for engine.

Hi, so I am trying to calculate the maximum height that would be achieved in a cylinder and have been give only the flow rate. The cylinder itself is a simple straight sided cylinder, the opening at the top has a diameter of 5cm and the hole at the bottom has a diameter of 0.5cm...

1. Homework Statement A pump steadily delivers water through a hose terminated by a nozzle. The exit of the nozzle has a diameter of 0.6 cm and is located 10 m above the pump inlet pipe, which has a diameter of 1.2 cm. The pressure is equal to 1 bar at both the inlet and the exit, and the...

Homework Statement A pump steadily delivers water through a hose terminated by a nozzle. The exit of the nozzle has a diameter of 0.6 cm and is located 10 m above the pump inlet pipe, which has a diameter of 1.2 cm. The pressure is equal to 1 bar at both the inlet and the exit, and the...

Homework Statement Inlet Average Velocity at Inlet = 2.50 m/s Pressure Abs. = 100 Kpa Elev = 2.00 m Inlet tube diameter 12.0 cm Water density 997 kg/m^3 Outlet Average velocity at outlet = 8.00 m/s Elevation = 2.00m a.) Calculate mass flow rate through the pump b.) w/ an outlet pressure of...

Hi, everyone. This is my first post so I figured I'd introduce myself very quickly before I get to the problem. My name is Matt and I'm a first year engineering student at Oregon State University. I've read quite a few topics here, but this is the first time I've really joined in on anything...

what is the water flow rate at an open 1/2" tap through 19mm diameter and 22mm diameter pipes at 4 bar pressure? I currently have 1/2" pipework and the delivery rate is terrible although I am told the incoming supply is from a 22mm pipe with 4 bar pressure. I am thinking of replacing the...

For a fixed pressure differential will the flow rate remain constant or will it increase as the restriction decreases. So imagine certain volumetric flow rate through partially opened valve, will the flow rate increase or will it remain constant as the valves is opened further? Assume density...

The Mass Flow Rate in a water flow system determined by collecting the discharge over a timed interval is 0.2 kg/s. The scales used can be read to the nearest 0.05kg and stop watch is accurate to 0.2 s. Estimate the precision with which the flow rate can be calculated for time intervals of a.)...

Homework Statement Water is flowing from a container through a 50mm diameter hole at 36 liters a minute. Calculate the flow rate in L/s and the flow velocity through the hole. Homework Equations The Attempt at a Solution flow rate all i did was 36L/60s to get 0.6 L/s flow...

1. Homework Statement Hi guys, A few friends and myself are having some trouble determining how to go about solving this problem for our engineering class. "An emptying tank in which the water level drops at a constant rate in time can be used as a water clock. Consider a tank where the...

Homework Statement There is a vertical 10 inch pipeline with a disc hanging in it. The disc weighs 7.3 kg. There is a flow coming from the opposite direction (water with density 1017.17 kgm/m3) coming at 2250 gpm at 198 psi in the opposite direction (moving up through a pipe). Is there...

Hello, Here are the knowns: Inlet open area = 17 inches^2 Outlet open area = 30 inches^2 Internal Fans = 270 cfm (3 fans @ 90 cfm each) What is the CFM through the system and what's the equations used to figure this out? Thanks a ton! John

Hi I have a challenge (Its over 30 years since I did physics). I have the following information and I want to calculate the flow rate change . Opening diameter 2m , narrows smoothly to diameter 1m. Seawater, tidal flow of 2.5 m/s into the opening, what is the effective flow rate in the throat...

I am looking for theoretical and/or empirical information about the extent in which a mesh/screen/net made of some kind of wires is slowing down airflow thru it, comparing to air flowing around it. At this point I am interested in meshes starting at a scale of insects screens (about 1mm) and...

Hi all, I have a question regarding the mass flow rate of air through a pipe. On paper, it looks like temperature and pressure effect the mass flow rate but I can't rationalize it in my head. Here's what I got: Goal: Calculate the actual mass flow rate of let's say, CH4 through a...

Homework Statement Hi, my first post here! I have a Thermodynamics resit over the summer and I'm trying to get my head around viscous flow, I'm stuck at a question and need help! Thanks :) Glycerine discharges to the atmosphere through a circular pipe 100mm in diameter. The gauge pressure 50m...

It is stated that as volumetric flow rate increses the available head decreases. Can anybody explain this sentence?

I am working on a project at an internship this summer regarding flow rates of a certain system that is used to test flow rates on tools, and it requires a bit of a hefty explanation. I need to increase the current flow rate (1232 GPM) to the desired flow rate (1800 GPM) because some of the...

Hi, I can't go out and measure this system up atm. But I have 36m^3/s flow rate at 400kpa. How would I go about predicting the flow rate at 500, 600, 700 and 800 kpa through the same pipe? I think it's a linear relationship but want to be sure. Thanks.

I am trying to find the flow rate in a duct that is quite large (around 4'x3') but is very short. This duct leads to a fan which leads to a separate unit through another short duct section. Both these duct sections have different sizes (the fan outlet is much bigger than its inlet). I will take...

two tanks were placed. tank one at a higher level and other(tank 2) at lower level. But in tank 2 a pump of flow rate Q ml/min is affixed.what is the flow rate in tank 2. Same as Q /min?

If I have a 1 ft tapered round hole through a 5 ft thick dam wall at 34 ft deep as shown in the attached diagram, how fast or at what volumetric flow rate will the pressure at that level push the water through the hole? I know that the answer will depend upon the viscosity of the water and...

Hello all, My basic problem is I'm trying to figure out what flow rate a diaphragm pump can provide through a length of pipe. I know the pump's max pressure and all the details of the pipe and the fluid (80w-90 gear oil), but can I solve this without knowing the velocity? Is there a way to...

Homework Statement Water flows through a tapered tube. At one end of the tube, where the diameter is 20 mm, water flows in at a rate of 1.0 liter / s. At the other end, where the water flows out, the diameter is 15 mm. How large is the flow at that end? Homework Equations No equations...

Homework Statement a gas turbine is designed to produce 3000hp when using air at a maximum inlet temperature of 650k and assuming a heat loss of 70 kj/s. if the exhaust temperature is desired to be no greater than 200 degrees celsius, determine the mass flow rate of air required. Homework...

The pressure at the start of a 180km stainless steel natural gas pipeline is 4MPa and at the end is 2MPa. if the diameter is 0.4m, what will be the gas flow rate through the system? (ignore losses other than friction, ρ= 40 kg/m^3, μ= 11x10^-6 Pa) Could anybody please point me in the right...

Homework Statement An experimental power plant at the Natural Energy Laboratory of Hawaii generates electricity from the temperature gradient of the ocean. The surface and deep-water temperatures are 25°C and 7°C respectively. The cold water that enters the plant leaves it at a...

1. Homework Statement The pressure at the start of a 180Km stainless steel natural gas pipeline is 4MPa and at the end is 2MPa. If the diameter of the pipe is 0.4m, what will be the gas flow rate through the system? (ignore losses other than friction) (For natural gas, ρ = 40 kg/m^3, μ =...

Hi there, after hours of frustration I've given in and come for help! I hope this isn't too long of a question, I really would appreciate any help I can get. :) I'm trying to work out the flow rate of gas down a pipe. My setup is simply an air compressor with a pipe coming out of it, with a...

Hi everyone, Hoping someone can point me in the right direction. I'm trying to find (a theoretical approximation of) the flow rate through a pipe where the pressure is provided by an axial flow impeller, but restricted by an orifice plate. I have (or can get hold of) all the physical...

Measured rate of gas flow vs theoretical rate of gas flow I am looking to set up an experiment to determine the maximum flow rate of gas through a 1/4" tubing. I have a spreadsheet which calculates the theoretical rate. The modified Darcy equation was used to calculate the mass flow of...