Pipe Definition and 1000 Threads

Hello. I need to determine the diameter of an exhaust pipe coming out of a 14" air duct. The exhaust would be perpendicular to the duct and connect to a vertical stack which exhausts to atmosphere. Supply air is 5000scfm at 2.5psi and 120F going into a gas heater which adds 400scfm air to the...

I work with pressurized pipe systems, and so I'm looking for some equation that link water temperature and pressure. In other words, when water in a closed system is heated, it expands, and so the static pressure increases. A typical problem will be determining the resulting pressure in a piece...

Hey Given the simple electric circuit below, the connection between the negative end of the DC source and the load (R1) is a pipe where heavy oil flow with some H2S and CO2. The pipe is made of iron and copper alloy. Without the DC current, H2S and CO2 will corrode the pipe. After introducing...

I'm writing the third in a series of Young Adult Sci-Fi/Fantasy novels, and I'm trying to calculate how much force would be required in the following: Imagine a pipe that is 1.25 centimeters in diameter and 3000 meters long. The pipe lies perfectly flat, but a meter of the pipe at each end is...

I am not familiar with non steady-state heat transfer problems, any resources on where I could get started would be a huge help: There is a pipe filled with a fuel/air mixture. This mixture is ignited at one end of the pipe, so that the flame front propagates through the pipe. How can we...

Hi guys Im trying to understand something.. If air is coming through a pipe, at a variable fan speed. (0.0053 m3/s) and the pipe is 10 meters long and coiled. Will the air reach the end of the coil? Or can air just loose pressure at a certain point? Thanks!

Homework Statement Homework Equations Hydrostatic equation The Attempt at a Solution Call length from 2 to the Hg "h". Yhg = specific weight of Hg, from book = 846lbf/ft^3 Yw= water = 62.4 lbf / ft^3 Then P2 = P1 + Yw(5sin45 + h + .5) - Yhg(.5) - Yw(h) Then P2 - P1 = simplify and plug in...

Homework Statement The horizontal pipe is very large and long: 100 feet in diameter and 1500 feet long with an infinite supply of air on both ends. The pressure difference between the two ends is 0.6 psi. I assume friction is near zero as the pipe is so big so I ignore it. What is the...

So I'm more into electricity, so fluids is not really a forte at all. But I have been thinking about this, and there must be some fundamental issue in the way that I view fluid pressure. Conditions: 1. I have a metal pipe, incompressible 2. There is water in the pipe, (incompressible? ...

Homework Statement For low-speed(laminar) , steady flow through a circular pipe, the velocity u varies with radius and takes what form? Please see this link for picture of the pipe...

Hi, I have a question regarding the flow rate in a pipe. According to the general rule the flow rate is: Q = v * A where Q [m3/s] v [m/s] A [m2] So according to this formula the flow rate depends only on the inner area of the pipe and the velocity of the fluid and does...

Homework Statement Apologies for the vague title but I'm not sure how else I could word it, also this isn't really a homework question per se however I'm not too sure where else to ask it. I think it would help if i set up a scenario. Say there was a pipe that released a fluid to a mass...

I'm designing a testing unit where I need to estimate the smallest diameter of a short complex pipe (around 1 meter, three bends and some diameter viariations). Since the pipe is being cooled down in a water bath after production, my idea is to force water with a known pressure in one end of the...

Homework Statement Before I write the question you should know that my maths is all correct in my solution but I must have used the formulas incorrectly (or used the wrong formulas). I can't pinpoint where I've gone wrong or if I have left a formula out (I'm a teacher solving this question for...

Homework Statement A small solid cylinder of radius r lies inside a large tube of internal radius R. Show that the angular velocity of the small tube $$\omega$$ is related to $$ \psi $$, the angle between the centre of mass of the solid cylinder, the centre of the large tube and the vertical...

1. Water is flowing in a pipe at 5ms-1, the end of the pipe is held vertically and discharges into the atmosphere, the velocity of water discharging from the pipe is: a=0.25 b=1.3 c=5 d=25 2. The water in the question above will rise to a height in metres of: a=1.3 b=0.25 c=25 d=13 I will be...

< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >[/color] Pics are attached, my concerns are with question 4 and 5. For q4 -which way is flow? How do we know? -the working then goes on to say that energy loss is compensated by increasing...

Is it possible to calculate the max flow rate (gals/m) achievable through a given piping system with only the following variables? - 4" SDR 11 HDPE pipe (3.633" ID) - 28,000 feet of pipe from source to destination - 90' of elevation change from source to destination - destination is another...

Thinking of individual fluid particles, my guess is that the "force" is simply particles backing up somewhat at the constriction point and contributing a higher proportion of collisions on particles ahead of them in a direction down the pipe. As the average movement of the particles is directed...

Homework Statement A fluid flows through a pipe. The flow varies with time. We want to estimate the volume of fluid (##V##, in ##L##) that passes through the pipe between time ##t = 10 s## and ##t = 14 s## (i.e. we want to integrate the flow between these times). The available instrumentation...

Hello. I'm new to the forums. I apologize if I have posted this in the wrong topic area. I'm new to this hydrodynamics area and I'm trying to learn the concepts of boundary layer thicknesses. My question is about laminar pipe flow and calculating displacement and momentum thicknesses. I was...

Homework Statement Open and closed pipe, give 5 beats per second. Open pipe is 30 cm long and gives a tone of frequency f0. Speed of sound is 330 m/s. How long do we need to extend closed pipe so both pipes give equal frequencies? Homework Equations Open pipe, fn=n*f1, f1=v/(2L) Closed...

Hi everyone, I'm doing a simulation and need some help. A capillary which is closed on both ends with the length l (x=0 to x=l), with a radius R and the volume pi*R^2*l is dropped on a parachut at the time t=0 from a hight h above ground. At t=0 the pressure inside the capillary is p_i0 (this...

I am a student currently working on a group project regarding the design of a gooseneck for a sub-sea pipeline. For those not familiar, a gooseneck is essentially a 45 degree bent pipe, to be used as a connection between a manifold and a longer pipeline (a flexible riser). part of this design is...

Homework Statement A pipe resonates at successive frequencies of 540 Hz, 450 Hz, and 350Hz. Is this an open or a closed pipe? Homework Equations -- The Attempt at a Solution My assumption is that because the harmonics of an open pipe are odd number multiples of the fundamental frequency (1f...

I am looking at air system that is under a constant pressure of 350 mbar into a pipe that has 40 - 2 mm round holes. Is there a formula that I can use to calculate the total volume of air nm3/hr that will escape the system? Let's just say the air temp is constant. Can anyone help with this?

Homework Statement does it mean only one side of the pipe is open or both sides are closed. Homework EquationsThe Attempt at a Solution i think it means only one side is open, but i just need to make sure

Homework Statement As shown in the figure, if the pipe net work is shifted bodily by 10m vertically up the tank, and all the other conditions remain the same as the previous figure. Will the volume flow rate change? Or I rephrase it as, in the calculation of elevation head of pipe flow, is the...

I am attempting to create a "lever" to lift the front of a 14ft 85lb Kayak up 7ft, then manually slide the Kayak to a rail, and then use the lever to lift the back of the kayak to another 7ft high rail on a truck. I decided to attempt this with PVC sections, creating an "L" the vertical shaft...

Homework Statement A long pipe is split to four four pieces along its length. The quarters are slightly moved apart and attached to constant electric potentials ##U_0## and ##-U_0## as shown in the cross section of the pipe in the attached picture. The walls of the pipe are thin and the...

I need create a math model to predict the temperature of a copper pipe with hot air flowing through based on the temperature of the air, properties of the air and copper, and the surface area of contact between the air and the pipe. The pipe will start cold but I will be looking to the...

Hello all, this is my first post here, so please excuse me if there are any mistakes or important information is left omitted. Now, my problem is quite intricate and specific so I will be thankful for any information I can get. Using Excel, I am looking to model the volume flow of air through...

Homework Statement One end of a long pipe is open. The other end is closed by a piston, which can be moved along the pipe, varying its distance from the open end. Although the pipe is filled with air, the speed of sound under the conditions inside is yet to be determined. A speaker near the...

I am looking all over and can't find the standard for the welding pipe with fittings into '4-'12 pipe array, by standard i mean the welding type, pipe\fitting preparation and any other Info\tips that can help.

I have made a pitot tube that I am using to measure the velocity of air in a pipe. First, I placed the probe into the pipe such that the hole in the probe was parallel to the flow to obtain static pressure. It did this successfully and I proved this using a piezometer. However, I then turned the...

Homework Statement Water (η = 1.00E-3 Pa·s) is flowing through a horizontal pipe with a volume flow rate of 0.0125 m3/s. As the drawing below shows, there are two vertical tubes that project from the pipe. Assume that H = 0.0458 m and L = 0.738 m. Calculate the radius of the horizontal pipe...

I like the new software... the email feed was a good idea, and it coincided with an interesting problem I've come up with, that I thought I'd share: A copper pipe: 14mm OD, 12mm ID, 45mm in length, with a 2mm thick x 18mm OD shoulder. The type that comes with a nut, for connecting to the...

Please help. I am Trying to calculate the time taken to freeze a 16" carbon steel pipe that is full of water with no flow. The water is at 20 oC and am using Liquid nitrogen feed into an insulated pipe freezing jacket surrounding the pipe to freeze it. If anyone can help with the calculations...

I have a pipe with regular diameter connected to a tap, the water comes from public supply, I assume that public supply can vary on pressure and flow rate. How can I guarantee that I allways get the same volumetric flow rate at the end of the pipe? Will a pressure reducer be sufficient? Thank you!

Homework Statement A tube is filled with air at 770C, one end open and on the other a piston. in the open end a tuning fork oscillates with 500[Hz]. The piston is set to different positions and at the distances of 18, 55.5 and 93 cm from the open end there is resonance. find the velocity of the...

Homework Statement What is the base frequency of a 20 cm pipe which is open on both ends. Again but closed on one end. Homework Equations u=velocity, \lambda=wave length: \lambda=\frac{u}{f} Velocity in air=348[m/sec] The Attempt at a Solution I understand these are standing waves in air. In...

I'd like to add a temperature probe to a 4" water pipe downstream of a centrifugal fill pump, but I am afraid of the probe shearing from being subjected to a constant force from the upstream pump (which pumps at about 400 gal/min). Naturally, my thought was to use the drag force equation, but I...

Hi there, I have a double-barreled question for you all. So I have two pipes connected to each other. The first pipe is 0.64cm and has a Re = 5000, the second pipe is 4.5cm and has a Re = 700. The two are connected so that the gas expands from the the first pipe to the second. Now, I wish to...

Hello; I have been toying with the idea of creating an Archimedes pump using PVC and 6 inch drainage pipe. The idea is that by using tubing coiled around a PVC core, and rotating it using torque on PVC collars, as long as the pump is angled correctly, and friction is sufficiently low (the...

If I have water being pumped through two lengths of pipe, both at 50 psi, but one pipe is 1.25" diameter and the other is 10" diameter, approimately how many gpm will be flowing through each pipe? Thanks in advance!

My chemical engineering is a little rusty after 25 years and I could use a little help with this real world problem. This isn't my project but I've been asked to advise. Sorry for the limited information. We have a 30 gallon tank with 75% hydrogen/25% nitrogen mixture at 100 psig. From the...

Hi, I just started a course in drilling and the first chapter is about various situations where pressure drops in the drill string (pipe) causes forces on the pipe. I understand that a pressure drop due to friction causes a downward force on the pipe. The fluid is "pulling" the pipe down...

I am making a basic structural engineering software program for modelling cylindrical pipes. I want to model the effect of fluid inside the pipes. For static fluid I let the user input the internal pressure and density of the fluid in each element. For moving fluid I additionally want to let...

I have some confusion about how blockages result in the laminar/turbulent flow of fluids in pipes. From my understanding, there is a certain diameter of a blockage in a pipe that will cause the flow to transition from laminar to turbulent (depending on the velocity of flow, etc.) What is the...

I need to find the velocity within a pipe , I know the flow rate and diameter Flow rate =0.01 Diameter =90mm Am I correct in thinking to use V =Q/A Where A is found using A=pi/4 x D^2 Using this I got A =0.0064m but somehow this does not seem quite right to me Can anybody...