Flow rate Definition and 464 Threads

I'm now making a vacuum chamber. The gauge pressure inside the vacuum chamber is about 250 mmHg. There will be some gap on the operating surface, about 2 mm width. The thickness of the gap is between 1 - 10 mm. What is the maximum flow rate per meter for the vacuum chamber?

Homework Statement Water flowing out of a 15.0mm -diameter faucet fills a 1.50 L bottle in 5.00s. At what distance below the faucet has the water stream narrowed to 10 mm in diameter? Homework Equations Bernoulli's equation: P_1+pgh+1/2pv^2=constant Q(volume flow rate)=vA Continuity...

Homework Statement A pump at ground level creates a gauge pressure of 102 kPa in the water line supplying an apartment building. The water leaves the tank into a pipe at a negligible speed. It travels up 10 m through the building and exits through a faucet. The cross-sectional area of the...

I'm trying to get my head around this question but having missed a few lecture through illness I'm going round in circles. Water is fed from a tank 12m above ground along a pipe 200 m long with a diameter of 125mm. Pipe frictyion factor is 0.008. K factors for the fittings, (tank exit, valve...

Is it possible to calculate the flow rate of water through a restrictionless device (a tank, for example) if you know the inlet & outlet diameters and pressures? I've been looking all over, but all I can seem to find is formulas for pressure drop in a length of pipe... Thanks!

Homework Statement see attachment Homework Equations Av=dV/dt mass flow rate =roe*dV/dt The Attempt at a Solution the velocity at point c is 50m/s and the area of the opening is 0.04m^2. (50m/s)(0.04m^2)(1000kg/m^3)=2000Kg/s

Homework Statement A horizontal pipe 10.0cm in diameter has a smooth reduction to a pipe 5.00cm in diameter. If the pressure of the water in the larger pipe is 8.00x10^4Pa and the pressure in the smaller pipe is 6.00x10^4Pa, at what rate does water flow through the pipes? Homework...

i have got a problem with a calculation involving a filter, i hope you all with lend me a helping hand. to calculate a diameter of a cylinder is rather easy, but how to determine the size of the water filter knowing only the flow rate of the pipe, diameter of the piping and the pressure of...

Mass is the product of density and volume. Mass flow rate is the product density, velocity, and cross-sectional area. (It's the derivative of mass with respect to time.) Bare with the syntax please... Looking at a sphere within a larger sphere, the volume of the difference is...

Homework Statement Find the viscosity of water given that; flow rate (cm^3 s^{-1}) = 2.0 height from tube (m) = 0.1 l (m) = 0.2 r (mm) = 1 \rho = 1000 g = 9.81 Using the equations; x = \frac{Flow Rate}{Height} x = \frac{\pi \rho gr^4}{8l\eta}The Attempt at a Solution Okay so first, and...

hi, problem: I have a flat plate of dimensions 2.6*2.2, above which a 4mm sheet of water is there(stagnant). Now i will lift the plate on one side, with certain rate till i reach the plate inclination some 10 deg. Physics: when i start lifting the plate on one side, water starts flowing...

I need help with flow rate please! Homework Statement A pump at ground level creates a gauge pressure of 102 kPa in the water line supplying an apartment building. The water leaves the tank into a pipe at a negligible speed. It travels 10m up through the building and exits through a faucet...

Homework Statement A room measures 3.5m by 4.5m by 6.0m. If the heating and air conditioning ducts to and from the room are circular with diameter of 0.30m and all the air in the room is to be exchanged every 12 min, (a) what is the average flow rate ? Homework Equations A1*V1=A2*V2...

Volume Flow Rate, Help? 1. The problem statement, all variable and given/known data The volume flow rate in an artery supplying the brain is 3.5E-6 m^3/s. (a.) If the radius of the artery is 5.4E-3 m, determine the average blood speed. (b.) Find the average blood speed at a constriction...

Homework Statement Consider the filling of a horizontal wedge-shape trough of height H, length, L, and width, B with water. (Imagine a water trough for horses with ends that are matching triangles). The volumetric flow rate of water in is given by Qi and the flow rate out by Qj. Obtain an...

Homework Statement An irrigation pipe of diameter 20cm carries water at an average speed of 0.1 m/s. By what factor must the pipe diameter be increased to achieve a flow rate of 1.00 m^3/min? The answer given is a factor of 5.3. Homework Equations Poiseuille's equation Q =...

Hi I have a question about measuring volume flow rate with a laminar flow element. I read the pressure difference across the element (mmH2o) and I get volume flow rate (cfm) from a calibration law. If that calibration law was obtained at standard conditions, would I have to correct it for...

Homework Statement Adiabatic Steam turbine produces 4000 kW Steam is fed at 21 bar/475 deg C Exhaust is saturated steam (P=0.1bar) Exhaust is fed into condenser where it is cooled to 30 deg C Problem asks for flow rate of cooling water supplied to condensener if water enters at 15 deg C...

Hi guys. Can u pls hlp me out. Let's say I have a 400 liter cylindrical tank with a tap at the botom. how do I calculate the rate at which the water flows from the tap and how far the water mite go? thanx in advance

I am on home oxygen and receive the gas through a 50feet long tube about .1" inside diameter.If the Machine delivers a flow rate of two liters per second, what is the pressure drop through the tubing; What is the flow rate at my end of the tubing?

Homework Statement A boat takes 2.0 hr to travel 31 km down a river, then 6.0 hr to return. How fast is the river flowing? Homework Equations r=d/t The Attempt at a Solution first started out by finding the rate the boat traveled in each trip. 31/2=15.5 km/hr 31/6=5.2...

the rate at which water is sprayed is given by the function f(t) during the time interval 0<t<4, what is the average rate of water flow?? I'm confused whether to use the formula f(4)-f(0) / (4-0) OR \frac{1}{4}\intf(t) evaluated from 0 to 4. help!

Homework Statement a 4mm hole is 1m below the surface of 2m diameter water tank. a.what is the volume flow rate through the hole in L/min? b.what is the rate in mm/min at which the water level in the tank will drop if the water is not replenished...

Hi , Does anyone know , how to calculate the flow rate from a manometer ? there is a pipe attatch to the venturi meter, the inside tube of venturi is 32 mm and the outside 62 mm. A fan is sucking the air, so flow rate is produced. Thank You

Hi, I hope someone can be of help with this problem I have, as I have tried different forumulas from different places but still havn;t come up with a sensible answer. I am currently developing a modification to a rotary fatigue rig. The steel tube being tested is required to be placed in...

guys, how to measure the volumetric flow rate pass thru a plane that varies in area (small variation)

[SOLVED] Simple volume flow rate calculation A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 4.0m/s. The speed in the second segment is 1m/s, and the speed in the 3rd segment is 16 m/s I thought that volume flow rate was...

Homework Statement The aorta carries blood away from the heart at a speed of about 40 cm/s and has a radius of approx. 1.1cm. The aorta branches eventually into a large number of tiny capillaries that distribute the blood to the various body organs. In a capillary, the blood speed is approx...

I am trying to better understand conceptually flow through a long pipeline. in this case the pipeline is 60miles long with a diameter of 13feet. the outlet is located lower than the inlet by about 600 feet and the pipe has several elevation increases and decreases over the length of the run...

A water tower, vented to the atmosphere, is drained by a pipe that extends to the ground. The top surface of the water in the tank is 13.3 m above the ground. If the valve in the drain pipe is closed, what is the absolute pressure in the drain pipe at ground level? 2.32×105 Pa If the valve...

Ok. I have attempted this problem several times and went about it a couple of different ways and still cannot get a viable answer! the problem is: A gas stream contains 18.0 mole% hexane (C6H14) and the remainder nitrogen. The stream flows to a condenser, where its temperature is reduced...

suppose there is an spherical balloon say 100 cu.m . The pressure difference between the air in it and surrounding air is 200N/m2 . If a hole of 1 sq.m is made what will be the flow rate from it. Of course the flow rate will decrease as the time progresses but how to determine it over a period...

I am trying to calculate the flow rate of a fluid with relatively low compressibility and a known viscosity (in centipoise) through a specific sized orifice under an exact known pressure. My engineering background is in electronics, and although I had courses in physics and I actually had a...

Hi, I'm trying to get the rig for my physics project set up which requires some constant water flow through the system. Unfortunately it's requiring a bit more water inflow than the tap can provide. I measured the tap's flow rate to be somewhere around 0.1L/sec to 0.3L/sec Now because I...

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Hi guys, This question is about the conversion between ppm and flow rate (I know you can't really convert between those two...) I have been looking on different products in the Internet, concerning the detection of a gas leak from pipes. It seems that each company is "measuring differently"...

Homework Statement Known/Given Water flows through a Venturi meter (mercury [density=13.6E3 kg/m^3] in the manometer). Pipe size: 10.0cm diameter Constriction size: 5.6cm diameter Height difference of mercury: 2.3cmUnknown - Flow Rate (L/s)Homework Equations Bernoulli's - P1 + (1/2)*d*V1^2 = P2...

If I know air is flowing through a tube with diameter of 40 cm at 18 m/s, with P=1 atm, T=32 C how do I find the mass flow rate..thank you

Find: Flow rate of water through square tube Given: Cross-sectional wall and area of square tube, A=w^2 Length of square tube, L Pressure at start, P1 Pressure at finish, P2 Water *** If you need specifics I am pushing water (room temp) at 1 bar through 1200mm of square tube that...

Homework Statement Figure 14-43 shows the merging of two streams to form a river. One stream has a width of 9.3 m, depth of 4.3 m, and current speed of 2.5 m/s. The other stream is 6.8 m wide and 4.0 m deep, and flows at 2.7 m/s. The width of the river is 10.2 m, and the current speed is 2.7...

A pressurized cylindrical tank, 5.0 m in diameter, contains water which emerges from the pipe at point C, with velocity 29 m/s. Point A is 10 m above point B and point C is 3 m above point B. The area of the pipe at point B is 0.08 m^2 and the pipe narrows to an area of 0.04 m^2 at point C...

Ok, Air flows through this tube at a rate of 1200 cm^3/s. Assume that air is an ideal fluid. What is the height h of mercury in the right side of the U-tube? Here's a picture: http://session.masteringphysics.com/problemAsset/1001181/6/knight_Figure_15_64.jpg First, I found the velocity of...

Steam enters a turbine at 3 mpa and 450 c, expands in a reversible adaibatic process, (KE and PE are negligible) and exhausts at 10 kpa. The power output of the turbine is 800 kW. What is the mass flow rate? I did the problem but I don't know if the anwser is correct and wanted to check...

Hi all! Is a pump having a high maximum flow rate necessarily mean that the maximum back pressure it can handle will be high? I am a bit confused bewteeen the relationship of flow rate and back pressure...

check this, i can't figure it out. A water pipe goes doewn a hill. the level of the pipe at the bottom of the hill is 23 m below the level of the pipe at the top. the diameter of the pipe is 2.7 cm at both ends. water is flowing through the pipe. at the top of the hill, the velocity of the...

I would like to know how to calculate the flow rate of water under compression by a hydraulic weight. How do you calculate using the value of the weight on top of the water and the height of the water in a straight column?

Does water that encounters pressure difference or slight resistance have the same flow rate if there were no pressure difference's or resistance at all?

I've been thinking about how to calculate how to find maximum thrust. But I can't find any equations for flow rate and pressure and area. I know that thrust is a force and force is mass x acceleration. But I don't know how id get an acceleration. There's an exit velocity at the nozzle of the...

Consider a water pump that receives liquid water at 15C and 100kPa, and delevers it to a same diameter short pipe having a nozzle with exit diameter of .01m to the atmosphere at 100 kPa. Neglect KE in pipes and assume constant internal energy u for water. Find exit velocity and mass flow rate if...

Hi all, I've been asked to search for a way, cost isn't that big of an issue, to measure flow rate in real-time of small, fast, abrasive particles (AlO2). These particles are, on average, 50 microns in diameter, and are shot out of a nozzle, itself just a bit bigger than 50 microns...