Flow rate Definition and 464 Threads

Homework Statement In the semiconductor industry, integrated circuit (IC) production begins with the mechanical slicing of silicon rods into wafers. Once the wafers are sliced, the surfaces are lapped and polished to uniform flat surfaces. Contaminants and microscopic defects (work damage)...

Hi all, I'm doing a experiment at home I'm trying to know how the flow rate on the water height that tossed from a nozzle with 3mm of diameter. By an other word if there is a relationship between flow and the height please some one explain it to me. Also I wana to know if the head pressure...

It's been a while since I've had to do these calculations.. I'm looking for the flow rate at the wall of a 3.175 mm nozzle tip. The diameter of the delivery leading up to it is 19 mm. This is a vertical assembly and the source of the air at 70 psi is a 1/4" outer diameter tube that is...

hi physics forum i am having a issue related to a tank size based on the flow rate and the diameter of the orifice. the dimensions would be the total height of the setup should be 1000mm the flow rate should be 525+/- 25ml/min the Internal diameter of the orifice is 4.3mm what would be...

1. 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 friciton) (for natural gas, \rho= 40kg/m3, \mu= 11x10-6 Pas2...

I need to hook up an instrument that requires a source of compressed air at 47psi and 4cfm. I have a pressure gauge so I can measure the pressure at the source. It seems to me that I should be able to calculate the flow rate if I know the pressure and the diameter of the pipe. Can anyone help...

I am a second year engineering student out on my first co-op work term. My supervisor's first task for me was to calculate the flow rate of one of his parts that he will use on a system that he is designing. I hooked up the part to a compressed nitrogen tank initially at 6,000psi. I cracked open...

How should steam quality, mass flow rate, temperature and pressure of the steam be optimized in order to have the most out of turbine? I mean which ones have be to be higher? Also when they design turbine, do they design it based on the properties of the steam or they change the properties of...

im trying top find the flow rate of water from a closed pipe. one thing that i think i can work with is a hose. there is a hose branching of the main flow pipe, which can be used to clean floor etc. im thinking that i can not open the hose and thus measure the stagnatiob pressure at the...

Hi there, I have a lab project. Part of the project is to calculate the volume flow rate, I have 2 tubes,radius' are known , density of the fluid is known and pressure is known. How can i relate the pressure to speed?

what is the average flow rate of water in the water jackets in an ic engine?

In the thread in P&WA on the issue of the oil spill, I expressed my skepticism that the rate of the spill could be accurately measured via analysis of underwater video clips. That skepticism was strengthened by the recent statement by Prof Steven Wereley, the originator of the first such...

How to keep liquid flow rate constant! hi, my grad. project is automated filling machine and am going to use a gravity liquid (water) filler tank ... my question is how to keep the flow rate from the tank nozzle constant while the liquid level in tank is changing as it fills every bottle ?

Trying to understand the basics of fluid dynamics after reading up on Bernoulli's principle. One thing I'm caught on. If I know the velocity of an incompressible fluid at a given point, and the force it exerts on a given mass at that point, can I then determine the density of the fluid, or would...

Ok another stupid/smart question, I got a bath with x m^3 volume. And a water flow rate of a tap is y m/s. I also know pressure and velocity. How can I calculate time to fill up bathtub? I know it's simple but I can not figure it out!

[FONT="Arial Narrow"]:smile:Hi I have been wrestling with this situation for a while, trying to derive an equation for it...A sphere is placed in a fluid of viscosity n and density p, outside any gravity. The sphere is instantly beamed out (perhaps by Capt Kirk?). At what volume rate will the...

Hello, Am the owner of a 90 acre man made lake and am trying to calculate the flow out of 12 inch pipe at the bottom of the lake. The lake is approximately 10 feet deep. Can someone point me in the right direction on how to solve this question?

Flow Rate Problem - Please Help! 1. Homework Statement : SAE no. 10 oil has a viscosity of 0.2 Pa· s. How long (in sec) would it take to pour 6 liters of oil through a funnel with a neck 12 cm long and 2.6 cm in diameter. Assume that it is poured in such a way that the oil level is kept just...

how can i obtain the pump flow rate ? is this done by filling a certin volume and measure time or there is another method ??

Homework Statement A pipe 0.15m in diameter has a roughness ratio (k/d) of 0.002 and carries water at a flow rate Q. Using the moody diagram, show that at high flow rates (where the friction factor is independent of reynolds number), the head loss per m length due to friction is approx...

Homework Statement A fire hose discharges water at a rate of 16.0 kg/s with a speed of 20 m/s. What magnitude of force is needed to hold the nozzle stationary? Homework Equations Impulse= Change in Momentum, Momentum (p)= mv, velocity final=velocity inital + at The Attempt at a...

Hi all - I would like to add a periodic inlet flow rate (Q(t) over an entire period T) as a BC in COMSOL. Does anyone know how to do this in 2D axisymmetric Transient Navier Stokes through COMSOL? I'm aware of the periodic boundary condition option available, but really just don't know how to...

(a) Is it true that if the mass flow rate of a gas is low, say 2g/s (grams per second), the friction losses and other losses in the piping will be negligible? (b) If it is true that losses in the piping are negligible, is it the Euler's dimensionless number that we can use to prove this...

Homework Statement An alcohol flows smoothly through a horizontal pipe that tapers in cross-sectional area from A1 = 43.7 cm2 to A2= A1/4. The pressure difference Δp between the wide and the narrow sections of the pipe is 8.8 kPa. What is the volume flow rate ΔV/Δt of the alcohol? The density...

Hi, I want to know how high the flow rate trough a pipe is (outlet), but I only now the pressure difference (0.7MPa or 7 bar), and the diameter of the pipe. At what speed (or for that matter volume) does air leave a pipe when the pressure difference is 7 bar, and the diameter is 25.4mm...

Homework Statement A liquid is flowing through a horizontal pipe whose radius is 0.02m. The pipe bends staight upward through a height of 10.0m and joins another horizontal pipe whose radius is 0.04m. Homework Equations what volume flow rate will keep the pressures in the two horinontal...

hello all, i am from electrical background and for a project i need to analyse the flow of oil through a hollow copper tube when the tube is subjected to some amount of heat. the outcome should tell me if the heat will be absorbed by the oil and what would be the stress points when i apply...

Hello, I have some physics homework and I'm not looking for the answers. Rather, the textbook I currently use does not seem to be doing a good job (in my opinion) in explaining the topics. If anyone has seen some of these questions before and know what textbook they are used in, please let me...

Hello Everyone, I am Mayur I am working on a system, in the system there is one diffuser through which exhaust gases at 3000K are flowing at a rate of 170Kg/s. The material of diffuser is Stainless Steel. The diffuser is double walled type with cooling water flowing between the walls. I need...

Homework Statement The absolute value of the heat flow rate through a slab of area 0.83 m2 is 240 W. The thickness of the slab is 1.4 cm and its thermal conductivity is 0.6 W/(m·K). If the hot surface of the slab is at 40°C find the temperature of the cold surface. Homework Equations...

Hi I am a post-doc student in a field having very little to do with physics and math. currently I am designing an experiement and have (i hope) a relatively simple question. here is the scenario: A ziplock bag (or similarly non-elastic reservoir) contains water, but is not maximally...

Homework Statement How can you determine the mass flow rate, given that net power output is 100 MW, of the cooling water if it enters the condenser at 20 C and leaves at 35 C. Homework Equations The Attempt at a Solution I thought that mass flow rate is the same all through...

Homework Statement I just need to get these eqn's together to form a DE Homework Equations Q = CA*sqrt(2gH) = -dV/dt and V = pi/3 * H^2 * (3*r - H) These eqn's refer to a sphere which has a flow Q of fluid out the bottom of said sphere. The radius of the sphere is r, the height H is from...

Homework Statement To better fight fires in your seaside community, the local fire brigade has asked you to set up a pump system to draw seawater from the ocean to the top of a steep cliff adjacent to the water where most of the homes are. 1. If the cliff is 12.0 m high, and the pump is...

Homework Statement Oil flowing through a pipe, measured to be 135kPa 15m from the end and 88kPa discharging from the end. The diameter of the pipe is 1.5cm, the density of the oil is 876kg/m^3, and the dynamic viscosity is 0.24kg/m*s. Find flow rate for: a) horizontal b) inclined 8...

Hi all, I am designing a pressure relief system for a high pressured gas (air) system. System consists of a highly pressurised gas receiver with PSV mounted driectly on it which vents via tailpipes to atmosphere. I know the max mass flow rate out of the container I know the back pressure...

hi how to find air mass flow rate in jet engine? we are using thrust/Isp equation to find the mass flow rate for rocket equation. is that any formula available for finding the mass flow rate in jet engine

A drug delivery infusion pump is made out of thick synthetic rubber and has a very small outlet. The balloon pump is filled with 500mL liquid drug and is now inflated into a ball shape. The drug will exit from the very small outlet at a nearly (but not always) constant flow rate of 5mL/hr (takes...

A drug delivery infusion pump is made out of thick synthetic rubber and has a very small outlet. The balloon pump is filled with 500mL liquid drug and is now inflated into a ball shape. The drug will exit from the very small outlet at a nearly (but not always) constant flow rate of 5mL/hr (takes...

Please help I'm going round in circles! Water on tank 12m high, feeding pipe 200m long and 125mm diameter. Open end. Given friction factor of 0.008 for the pipe and total of 3.2K for various fittings. Asked to find water flow rate in Kg/s in the pipe. Been looking at this for ages...

Hi I am designing a heat exchanger. I know the mass flow rate required for cooling. I have calculated the pressure drop for current design. How do I work out if the size if the heat exchanger can handle the flow rate ? Does the mass flow rate depend on the size of the heat exchanger tubes ...

Homework Statement A horizontal water main with a cross-sectional area of 220 cm2 necks down to a pipe of area 55 cm2. Meters mounted in the flow on each side of the transition coupling show a change in gauge pressure of 85 kPa. Determine the flow rate through the system, taking the fluid to...

hi all, First all my disipline is not fluids so this is why asking for little help here on the following. Basically i have all the required information but i can't seem to figure out how the answer to the mass flow rate of an orifice is obatained, its doing my head in, if anyone could...

need help in flow rate... hi, i am just new here... hope anybody could help me here... i am making a pond just like my username says... my problem is, my pond is around 2000L and has an outlet of 2inches at the bottom corner of the pond. how do i compute the flow rate, coz i want to...

What would be the effect on a choked mass flow rate if there were fluctuations in the downstream pressure? Thanks

Homework Statement Hello everyone, I'm working on a summer project with filters (they're rather simple). Anyways, my professor suggested that I calculate flux through the final surface of the filter, which I guess is speed of water? Long story short, I'm having a real problem with this... I...

1. A large tank isopen to the atmosphere and is filled with water. A small hole is 16m below the surface of the water. If the flow rate of the water is out of the hole is 2.5e^3 m^3/min, calculate: a)the velocity of the water as it leaves the hole and b) the diameter of the hole. 2. Let's say...

Hi, I'm currently trying to work out the forces involved in raising a traffic barrier. It works using hydrolics. It has a motor that has a speed of 1400 rpm and 1/3 hp. the torque of the motor is 200Nm the pump is a lobe pump and has a delivery of 1.5 l/min. The pump will move the...

I want to clarify this because I'm still not sure how to find the mass flow rate, for instance from a rocket. I still puzzled from the formula that describes the mass flow rate which is \frac{dv}{dt}. This the formula that I'm currently looking over but I'm not sure if its this formula to find...

Homework Statement At a point upstream the measured mass flow rate is 10 kg/s, downstream of this location the velocity profile is measured and obeys the relationship u(r) = U(max)(1-(r/R)^(1/5)) where R is 0.16 m. Find U(max). The diagram provided with the question is provided below...