Pipe Definition and 1000 Threads

I have designed a heat exchanger of the double pipe hairpin variety and with 6" and 8" concentric tubes. The overall length is 90m therefore I need to connect nine 5m hairpins (10m total length) together but thinking about the practicality of it is it possible to connect this number in series...

Here's my situation: I have a long pipe with n amount of openings along the top, that have an equal distance apart. At one end of the pipe a constant pressure is applied by a pump, and the pipe has a constant diameter all the way to downstream. I’m trying to find a mass flow rate by changing...

Let's say there is a water based heating device that has 3/4" connection nipples. The pipe that leads to the device is 5/4". If one ignores pressure- and head loss, does it make any difference how far from the device the pipe reduces from 5/4" to 3/4" ?

Im just generally reading through the notes for thermal design for a counterflow double pipe heat exchanger. Is it possible for all temperatures inlets and outlets to be different for this type of flow arrangement? What is confusing me is the temperature profile graph where Th2 appears to...

Homework Statement Hi :) This question is from a test i had today. For some stupid reason we get to finish it off tomorrow. I figured i do what everyone else will, and sort out the what i didn't understand. Luckily this was it. Anyway, the question is typed from memory so it may seem a bit odd...

Homework Statement Chapter 12, problem 34. An auditorium has organ pipes at the front and at the rear of the hall. Two identical pipes, one at the front and one at the back, have fundamental frequencies of 264.00 Hz at 20.0°C. During a performance, the organ pipes at the back of the hall...

Does anyone know the equation to find the flow rate, in GPM, of water through a vertical pvc pipe? No pump, just gravity.

An ideal fluid flows through a pipe with radius R with flow speed v. If the pipe splits up into three separate paths, each with radius (R/2), what is the flow speed through each of the paths? Would we just use the flow rate equation giving a flow speed of 4v in each of the paths? Does the...

I stumbled on this question while studying sound waves today, and it has got me stumped. I've been thinking this through for hours, to no avail. It goes: A park has a circular fence with a metal pipe as the top rail. If the fence is hit with a hammer it produces a sound of 350 Hz. At a point...

Hello I am trying to better understand transient fluid dynamics in pipes. First, I am attempting what I believe should be relatively simple problem. I have a constant area horizontal pipe partially filled with a stationary incompressible inviscid fluid. The part of the pipe that is filled is...

I want to calculate the temperature on the outside of a pipe which has a heated fluid flowing through it. If I know the temperature of the fluid and the ambient temperature, as well as all the material properties such as thermal conductivity and convective heat transfer coefficient, is there a...

The equation I have for velocity through a circular orifice plater is as follows: Ud = \frac{Yi\timesC}{\sqrt{(1-(d/D)^4)}}\sqrt{\frac{(2\times(P_{2}-P_{1})}{\rho}} To my understanding, flow becomes choked when this velocity exceeds a Mach number of 1, and is no longer sub-sonic...

Hi, I am stuck on what should be a fairly simple problem. I need to calculate the torque required to rotate a pipe weighing 30 lbs resting on bearings at constant speed. How should my approach be? Do I need to actually measure the torque required using a sensor? Thanks, Mike

Homework Statement Okay, so this was Part 1: ... which I solved as follows: \phi=\int_{Surface} v \cdot da =\int_{Surface} v*da\cos\theta =\int_{Surface} v*da =\int_s\int_l v*(dsdl)=v*s*l Now this is Part 2: Figure 1.29 We slice the end of the pipe off at some angle \theta. This does...

Homework Statement Water flows with a speed v down a rectangular pipe of dimensions s and l as shown. What is the rate \Phi=volume\, per\, unit\, time at which water accumulates in the bucket? Homework Equations \Phi=\int_S\mathbf{v}\cdot d\mathbf{a} The Attempt at a...

As a part of my Project I'm experiencing a serious problem, "Blow out of Pipes in Compressor". In that we are trying control the blow out. Let me tell you the real scenario. The outlet of the HP Compressor is connected to a pipeline which in turn is connected to the reservoir. HP Outlet -...

Homework Statement An organ pipe is 84 cm long and at a temperature of 20 degrees C. What is the fundamental (in Hertz) if the pipe is closed at one end? Homework Equations To best honest, I'm not really to sure where to start. Can anyone please help? Start me off? Thanks in advance!

Homework Statement Use the picture as a guide. P is the pressure in the pipe, and vi is the speed of a non-viscous incompressible fluid at locations i = 1,2,3,4,5.(For each statement select G-Greater than, L-Less than, or E-Equal to). A) P1 is ... P4 B) v1 is ... 2v3 C) P4 is ... P5...

I have a mass flow rate, an area for the pipe and thus the diameter. I need to know the length of the pipe, but I end up with one equation and 2 unknowns. Is it possible to use the mass flow rate to somehow find the volume, which, in turn I can use to calculate the length? Or, any other...

I posted this in another section and haven't receive any feedback so I thought I might have it in the wrong section. Thanks in advance for any help. I'm at little rusty on my heat transfer and could use some help. I'm trying to calculate the approximate time to freeze standing water in a...

I'm at little rusty on my heat transfer and could use some help. I'm trying to calculate the approximate time to freeze standing water in a 18inch steel pipe. I have some parameters and made some assumptions and they are: The pipe is 18inch carbon steel The standing water is initially...

I'm doing a project on flow rates in a pipe system using the hazen williams formula, does anyone know of a spread sheet or computer software that does this. I have been told that it is possible doing it in Microsoft Excel, does any know?

I've heard a saying that some fighters in blackmarket boxing could do this incredible thing. Is that true? Do you have any detailed proof of that? Aren't their legs made from protein?

Hi All: I am trying to calculate volumetris flow rate in a semi circular pipe with a fixed pressure but seem to have problems. I have calculated in a circular pipe as Q= (Pi (P1-P2) R^4)/8uL Can anyone comment on how to calculate for semi circular pipes? Regards

Hi there I have a 19mm pipe. I will measure the flowrate of the water by filling a known volume container and timing it. Is it possible from this information to work out the pressure of the water coming out in psi or something similar? Help appreciated. Thanks

Homework Statement thin, hollow 60.0 g section of pipe of radius 14.0 cm starts rolling (from rest) down a 17.5° incline 5.60 m long. (a) If the pipe rolls without slipping, what will be its speed at the base of the incline? (b) What will be its total kinetic energy at the base of the...

1. A hydroponic garden uses the 10 m long perforated pipe system to deliver water at 20ºC. The pipe is 5cm in diameter and contains a circular hole every 20 cm. A pump delivers water at 75 kPa (gage) at the entrance, while the other end of the pipe is closed. pressure near the closed end of the...

Hi What is the fundamental reason why a fluid with laminar flow going through a constriction in a pipe has lower pressure? Pressure is defined as force per unit area so the fluid particles must be hitting the pipe wall in the constriction with less force. Beetroot

Homework Statement Water flows at 6.1 m/s in a horizontal pipe with a pressure of 3 ´ 104 N/m2. If the pipe widens to twice its original radius, what is the pressure in the wider section? Give answer in Pascals. Homework Equations volume = length x area rate = volume / time rate =...

I have always wondered why there is a noticeable change in the sound of water flowing from a pipe when the water temperature changes. When I first turn on the hot water faucet after a long period of being off, there is a steady pitch of sound I hear. I am referring not to the sound of the water...

Homework Statement A certain organ pipe, open at both ends, produces a fundamental frequency of 291 Hz in air. If the pipe is filled with helium at the same temperature, what fundamental frequency fHe will it produce? Take the molar mass of air to be 28.8 g/mol and the molar mass of helium...

Hey guys, I am studying in heriot watt university Dubai. I would like to be a Fluids expert. I have been doing well in my course-works and my professor usually helps me around to get a few extra info. However recently due to a tight schedule he is unable to help me out. I have managed to...

Hello, I have a question about standing sound waves in an open pipe caused by a speaker, I know that normal mode frequencies are given by f_n = n\frac{v}{4L}, \quad n=1,2,3,... if we put a microphone into the pipe, and if the frequency of the speaker is a normal mode frequency, we see...

Homework Statement A pipe is designed to have its cross sectional area decreasing linearly from 12-inch diameter to 6-inch diameter. What is the acceleration rate at a section 10 inches from the ending section of 12-inch pipe at time = 3 sec? The volume flow rate Q=2t cfs (note: t is in sec)...

I work at a cement distribution terminal. We load bulk powdered cement pneumatically into ships. Part of this operation is to remove the excess air from the ship by use of dust collectors. I need to know if my dust collectors are pulling enough cfm to keep up with the total cfm going into the...

Homework Statement A storage reservoir is continuously filled through a pipe delivering 2.2cfs. The reservoir is circular in shape with a diameter of 20 ft. The height of the tank is 12ft. A pump operates for the last 5 minutes of successive 20 minute intervals, draining out 350 cubic feet of...

Hey guys n gals, Looking for a little help here. I am looking to build an equal length header for my truck and was wondering how to calculate the losses through the amount of 45, 60, 90 and 180deg bends for 1.5 sch.40 pipe. Now, for clarity, I do NOT mean equal centerline length, that's easy...

Hi can anyone help me? I am researching into organ pipes, and dealing with a flue organ pipe that is 16ft long and open at the top, my conundrum is: is the organ pipe open at the bottom where the air flow enters? i can find no definitive answers, can anyone help/send me a link? thanks

Hi, I am stuck on this question as I haven't encountered anything similar to it. Normally I have only dealt with pipe with one inlet/outlet. Homework Statement I am given a diagram of the pipe shown on the attachment (Sorry for the crude diagram). Hosted it while the attachment is "reviewed"...

Does anyone know how to calculate the entry region length of laminar incompressible flow in a pipe? There are several formulae available which give a ratio of the (entry length)/(pipe diameter)/(Reynolds number) = 0.02-0.06. I'm not looking for the final solution, but rather the approach...

The new chevy volt design was unveiled today: http://news.yahoo.com/s/ap/20080916/ap_on_bi_ge/gm_centennial;_ylt=AuVoT6aLIov8pyZGWNXsNjxsaMYA" There's a lot of controversy over this car in the engineering world. Since its being developed right in my neighborhood I hear a lot about its...

Hi Folks, How would one go about calculating the drag force that would be applied to a wire (or in our case a small (0.130") fiber optic cable, that is inside of a small diameter pipe (.56")? I've tried several methods, but none seem to match what we actually measure when experimenting. We...

I'm wondering about the the term 'Diametre Nominal', or 'NPS' as it's called in the US. I've realized that pipes that are identified by "nominal" names are only loosely related to the actual dimensions. For instance, a 2-inch galvanized steel pipe has an inside diameter of about 2 1/8 inches and...

I am in he rock drilling industry and I am looking for a formula to be able to calculate what the maximum CFM is through a pipe. For example I have a 0.5” dia. pipe, 600CFM @ 150psi compressor. What is going to be the actual CFM that I will get at the end of a pipe? Any help will be greatly...

Hi, I need to resit some exams and I'v been having difficulty trying to solve this problem. Estimate the velocity and angular velocity of an empty pipe of mass (m)=1000kg, Diameter (d)=10mm, shell thickness (h)=1mm at the bottom of a slope of angle \theta=45^{}o and path length L=5000mm on...

Homework Statement The organ pipe is 2.0 m long, was open at both ends, and was originally tuned to a fundamental frequency of 128 Hz (C below middle C). a) what is the wavelength of the fundamental? b)if the note you now hear is closer to 262 Hz (middle C), where is the blockage with...

Homework Statement a pipe in air at 20 degrees celsius ia to be designed to produce two succesive harmonics at 240Hz & 280Hz. how long must the pipe be, and is it open or closed? Homework Equations v=\lambdaf The Attempt at a Solution sorry, i could not do it. i totally can't...

Does anyone know how to determine what size/type of pipe/tubing would be necessary to withstand given wind speeds? Specifically, I'm wanting to build a "megatree", an outdoor Christmas tree made simply by stringing lights from the top to the bottom in a conical shape. I'd like a 20' + tree...

So many places I've seen components (fancoils and such) with inlets that are let's say 1", but where the pipe leading up it is maybe 1 1/2". Does that make any sense at all? Can pressure drop have something to do with it?

Through a pipe 15.0cm in diameter, water is pumped from the Colorado River up to Grand Canyon Village, located on the rim of the canyon. The river is at an elevation of 564m, and the village is at an elevation of 2096m (a) What is the minimum pressure at which the water must be pumped if it is...