Flow rate Definition and 464 Threads

Hello, first post here. I had a bit of an odd question that I can't get my head around, but I think is possible. Given the environment described in the picture, can you measure the amount of gas that is flowing from the hole in the box given that the pressure in the box has stabilized at a...

I am really not sure how to go about this problem, can anybody please give me an indication on how I can start solving the problem? Homework Statement An open rectangular water tank 1.2 m x 1.2 m x 2.6 m (height) is completely filled with water. As the tap at the bottom is opened, the flow...

Hello, I'm new here - so apologies in advance if this is in the wrong place, also I haven't done physics for a few years prior to the course I just started - and I've never tried to write out formula in computer text, so apologies in advance again if everything I write is completely wrong! :-p...

Homework Statement I have a Coriolis mass flow meter and I'm supposed to run water through it at different flow rates. I have a motor / pump which is controlled by AC drive (which is controlled by potentiometer). Also, I have a pressure transducer mounted at the input side of Coriolis mass flow...

Hey guys, just have a question because I'm having a little trouble understanding like how exactly to use the volume flow rate with bernoulli's equation. (wasnt sure which section to put this in but is more of a concept question using homework examples) Like the volume flow rate i understand...

Hello all. I am new to this forum. I am an electrical engineer, and I am working on a system which requires me to calculate a flow rate. Once I know this, I can continue with the design. Since I am an electrical engineer, I have insufficient knowledge of fluid dynamics to know how to set up the...

Today in a lecture on chromatography the lecturer gave an explanation which seems pure ******** to me. The example she used was a handful of solutes, each taking a different path through the stationary phase, obviously some paths will be longer than others and thus each solute will have a...

Flow rate measurement: Venturi vs Sharp edged circular orifice. Help! :) Homework Statement Hello guys, I am having trouble answering these questions. I know the the discharge coefficient for a venturi is always higher than that of the sharp edge orifice. Can you guys help me out with the...

i have a piping system and i know the initial flow rate into the system. the the piping system steps down several times through tee fittings on its way to a final nozzle in which i have required minimum flow rate. i know the flow rate going into the tee but i can't find any information about the...

Urine flow meters are used to diagnose urinary flow obstructions such as might occur in the even of enlargement of the prostate gland in men. The Stream-test™ is a simple home uroflow meter consisting of plastic cup with a hole in the base. The maximum height of the urine in the cup is...

I've been searching all over in aquarium related forums for an answer to this questions and haven't been able to find a definitive answer. Background: Many saltwater reef aquariums utilize a filtration system located in a sub-tank (called a sump) beneath or remote of the display tank...

I have been searching for formulas to determine the flow rate and velocity of air through an orifice at a given pressure differential. I need to know the flow rate to determine the CFM requirements of the compressor. And I need to determine the velocity to be able to accurately size the...

Specifically, I have a certain flow rate in (volume/sec) and I know the pressure of the resevoir at a certain point. If there is a hole in the tank/resevoir at that point, how big should it be to achieve the given certain flow rate?

I need some help in understanding a few things about air compressors & in particular Centifugal Compressors, could someone help me out with this please. This is not homework, just me trying to understand. If a Centrifugal compressor is rated at "just for example only" 10bar pressure @ 100...

Dear all, Take my best wishes. I am facing a problem designing my experimental setup for my research. I want to produce flow separation over a flat plate. Here is my experimental setup: Diffuser angle is 16deg. I need some documentation/text book regarding the effect of suction flow rate...

Hello everyone, I got a question that has been bugging me for quite a while and i can't seem to find the answer for it, and here it is... If we have a pipe let's say 20" in diameter, with a flow rate of 1 m^3/sec at a pressure of 10 psi, and we get a pressure drop of 9 psi, is it possible...

Volumetric flow rate (simple?) Assuming reservoir level stays constant, and friction losses are negligible compared to gravitational effects, which overflow config achieves a higher volumetric flow rate? http://boards.420chan.org/tesla/src/1311021903815.jpg --------------------- Now...

Hi! I need some help with the following - I have a square oven that has an outer shell of stainless steel (10mm thick) that has a skin temperature of 180degC. Outer shell size of each side is 800mm x 800mm. This has to be water cooled to bring down the skin temperature to 50degC. We need to...

The Pipeline Rules of Thumb Handbook uses the equation Q = D^2*P to estimate the flow rate of escaping gas from a pressured line (see link below for excerpt) under standard conditions. Where Q is flow rate in Mcf/hr, D is diameter of the nipple or orifice in inches, and P is the absolute...

I am trying to figure out the flow rate (gallons per minute) and PSI of the water just as it exits the top of the pipe. Is it possible to figure out these out given the information in the diagram?

The scenario: I have a bag containing 3L of water, attached to a tube with the end placed on the floor (or a fixed height from the floor e.g. a bucket placed on top of a chair at 60 cm). I plan to hang this bag at heights of 100 cm, 120 cm, 140 cm, etc... until say about 200 cm from the floor...

I am going over a past paper and this is my last question I am stuck on. Once I can solve this I can finally progress. This is from a past paper and my exam will be on a variation of the question. Can someone please talk me through the questions, displaying the method, calculations and...

A horizontal pipe tapers uniformly from a diameter of 150mm to a diamter of 70mm and carries water (1000kgm3). The pressure at the wider diameter is 100kPA and the pressure at the smaller diameter is 60kPA. Calculate both velcoties at either end and the volume rate of flow.

A natural draught cooling tower is designed to have a 3% loss of the mass of the water entering the tower by evaporation into the atmosphere. Atmospheric air enters the tower at a volume flow rate of 4 m^3/s a temp of 10C and a relative humidity of 50%. Air leaves the tower in a saturated...

Hi All, I was given the challenge of building a high flow rate pump, but I haven't been able to find any resources were useful. I'd like to control the pump and its pulsatile nature with a LabVIEW VI. I know I'd have to get a stepper motor and a DAQ board, but I'm not sure where to begin. I'd...

Hi. I used google and found this place. I figure its as good as any to ask this question, which I'm sure forces you guys to dumb yourselves down about 3.14 notches. And this very well may not be the place to ask this question, so feel free to tell me to sod off if there's somewhere else I...

Homework Statement By what factor does the flow rate decrease when a water pipe of diameter 20 cm with a 10 cms^-1 flow rate, splits into two smaller pipes of diameters 11.54 cm and 16.33 cm? Homework Equations Q(volume flow rate)=(average velocity)(cross sectional area of flow) The...

Hi all, This is probably nauseatingly simple but I'm struggling to get my head round it and would very much appreciate assistance! I'm building a filter system for a rather ambitious desert pool project and I'm having difficulty predicting the pressure in the pump/pipe network. I've been...

Homework Statement You wish to design an oil pipeline such that the flow rate under gravity alone will be as large as possible while remaining non-turbulent. the diameter is .45m, the viscosity is .385 n-sec/m^2, and the reynolds number is 2000. (a) what is the maximum flow rate you can...

Homework Statement Calculate the mass flow rate of blood (of den- sity 1 g/cm3) in an aorta with a cross-sectional area of 2 cm2 if the flow speed is 43 cm/s . Answer in units of g/s. Homework Equationsm=pAv The Attempt at a SolutionHey guys! I can tell that this is a very...

Flow Rate through a pipe! Oil flows along a horizontal pipe which varies uniformly in section from 100 mm diameter at A to 150 mm diameter at B. At A the gauge pressure is 126kN/m2 and at B 140 kN/m2. Find the flow rate in litres per second and kilograms per second. The density of water is...

I've posted on here in relation to an aerospace analysis project I'm doing. I'm stuck on one part of the project where I need to develop the performance envelope of the turbojet engine. 3 of the 9 plots that are required are Thrust vs. Mach number. On each of those plots I'll about 7 different...

I can't seem to find an equation that fits the situation I am facing. Either that, or I just don't believe the answer the current equations are providing. I am trying to develop the size for an air compressor to fill up a train braking sytem. I have equations for most of the system, but I...

Homework Statement Steam at 400oC enters a nozzle with an average velocity of 20 m/s. If the specific volume and the flow area at the inlet are measured as 0.1 m^3/kg and 0.01 m^2 respectively, determine (a) the volume flow rate in m^3/s, and (b) the mass flow rate in kg/s Homework...

Homework Statement In an aortic aneurysm, a bulge forms where the walls of the aorta are weakened. If blood flowing through the aorta (radius 1.0 cm) enters an aneurysm with a radius of 2.5 cm, how much on average is the blood pressure higher inside the aneurysm than the pressure in the...

Is there an equation with which I can estimate the flow rate a fan will generate at a set diameter, speed and angle of the blades? Assume that this is a simple box fan that you would put in your window. I'm assuming that you would have to determine the axial speed of the air given the angle...

I'll elaborate a little. I trying to work out how to calculate and how to make at least 180 F (80 C) and 3 gallons per minute (11 liters/min)? Thanks in advance! Adam

1. In an air conditioning unit fresh air at 10°C is mixed with warm air at 30°C. If the mass flowrate ratio of warm to fresh air is 1.6, estimate the temperature at which the mixed air leaves the air conditioner. State any assumptions made. and also do you always make the air standard...

Refrigerant-134a is to be cooled by water in a condenser. The refrigerant enters the condenser with a mass flow rate of 6 kg/min at 1 MPa and 70oC and leaves at 35oC. The cooling water enters at 300 kPa and 15oC and leaves at 25oC. Neglecting any pressure drop, determine (a) the mass flow rate...

It's been a long time since I had to do any calculus and longer still since I had to deal with ideal gases but now I'm confronted with both. The problem setup is this: Air is coming into a compressor at a known mass rate, pressure and temp. It's being compressed to fill a known tank...

I wonder if there is a mathematical formula to calculate the flow rate of a fan if following parameter are known Fan effective diameters Blade Angle ( Pitch ) Number of Blades Speed ( RPM ) Power Consumption Pressure at inlet of the fan Regards

[b]1. Homework Statement Tap water flowing has an cross section area of 1.2cm^2 near the tap. after a height, h=45mm the cross section becomes 0.35cm^2...find the volume flow rate of water from the tap Homework Equations g=9.8m/s^2 The Attempt at a Solution i think of using these...

I am working on a Hydro project. Just can't get this right. I have a water tank (cone shaped) with Radius 60 Inches and height 120 Inches. The Tip of the cone has a nozzle with a 3 inch opening. If the Air pressure is ignored. What will be the flow rate of water and pressure. ?

Homework Statement I am supposed to find the mass flow rate for the two resulting water jets. Homework Equations Bernoulli's equation Mass Continuity equation Momentum equation The Attempt at a Solution I've assumed the two areas for jet A and B to be equal, and used mass...

ap physics student, on this for the first time The flow rate of water through a garden hose is 60 cm3/s, and the hose and nozzle have cross sectional areas of 5.1 cm2 and 1.6 cm2 respectively. (a) If the nozzle is held 11 cm above the spigot, what are the flow speeds through the spigot...

Homework Statement a) A student taking a shower notices that the power rating of the shower is 9 kW. Estimate the flowrate of the water. I think I have to use the equation Q = m c \delta T However I have not beeen given any temperature or anything, like that, or the mass? How would I do...

I am a novice pipe designer and I have a project starting on Monday. I have to design a Filtered Water Supply system. The pipe is SS and the majority of the header is located outside. The engineer said no insulation is needed if we put a recirculation system in. He says by keeping the water...

i have this question which asks me to find the average flow velocity in a pipe, BUT based on flow rate relation and not statistical average what is the flowrate relation?

A 10 m high, 5 diameter cylindrical water tank has an inlet at the top and a drain at the bottom. The flow rate out of the tank depends on the pressure at the bottom of the tank via the following: dm/dt = (10^-4)*(P_bot) where P_bot is the absolute pressure in Pascal at the bottom of the tank...

i need some help becoase i become confused according to pump characteristic curve if the flow rate increased the head will decreased the question is how i can increase the flow rate and what is the relation of RPM with head and flow rate