Pipe Definition and 1000 Threads

Homework Statement This is in the pipe flow section and the solution treats this question like a pipe. Here is the solution: As you can see I circled the pipe flow equations in red. If this is the case shouldn't there be frictional head loss, hf, caused by the walls of the tank? I...

Homework Statement An engineer is designing a system that requires transporting .01 m^3/s of helium at 15°C and 120 kPa. The velocity of the pipe is limited to 40 m/s. What size (diameter) of pipe is needed? My question is what equation do i need to solve this problem? Homework...

Good day to all, was wondering how a pressure regulator doownstream will affect the flow rate of compressed air through a pipe. Anyone has any insights on this? the pressure regulator is to reduce the downstream pressure but I'm really confused how the flow will be affected. For instance, will...

1. Water at T1=240 C and P1=16 MPa is at 2 km depth. A drilling hole with diameter 0.2 m has the water flowing up with mass flow rate at 2 kg/s. The hole is considered adiabatic(no heat transfer). I need to find the following values at the top of the hole: Enthalpy(h), temperature(T2)...

Homework Statement The Attempt at a Solution I am interested in why my method is flawed: Alright I know how to do this problem. Essentially you solve mass flow rate = rho * double integral of u dA. HOWEVER, I decided to do this differently. I know that I can solve for the average u from...

Hi Everyone, I'm working on some inductance calculations and was wondering if anyone knows of any formulas (or methods) to determine the inductance of a straight piece of copper pipe, if the ID, wall thickness, and length are known? The closest thing I have found so far was the inductance of...

If I have a series of pipes and containers (containing liquid) soldered together to create a circular path, and then heated at a particular point or multiple points, is it possible to somehow have the gas move in a particular direction without the gas every leaving the system? I'd prefer not to...

Hello All, Problem Statement : This is for design of a 24" sparge pipe for transporting hot water (85 deg C) for over 60 ft. Asked to calculate the Back pressure Data : Liquid in the pipe: water Flow rate : 3010 m^3/hr = 0.83611 m^3/sec Pipe Dia : 24" = 2.032 mts No elbows...

It has been several years since I have dealt with fluid mechanics. I have a 4hp pump that circulates the water in a 4ft swimming pool. A 2in pipe is connected to the outlet which runs up about 1ft. It passes through a shutoff valve and is then split into two streams, both 2in pipe, by a...

Homework Statement The Attempt at a Solution So first I found the density of the air coming in and going out. Next I used conservation of momentum with two forces caused by the pressures at the entrance and the exit of the nozzle. I end up getting 1004 which is not the same as...

Please see attached for question and attempted solution, Im pretty sure this is correct, can anybody confirm? Regards, A

Okay I'm currently doing a thrust block design for a water supply system. The new line is a 250mm line. The water is fed from water towers where council has said the operating head is about 30m. I've set up my thrust block program in excel and it is all working fine. The only trouble is I'm...

This is a real world project. I'm building a giant roll-up window shade to be used for a special effects green screen. The first real model attempt (without math) failed. See the two pictures of the tube structure being held up by chairs. The only axle was about 3ft of 1.5" pipe at each...

Hi there, Had a physics project in university that looked at the heat transfer of a pipe in a cement block for snow melting. When I modeled it using computational fluid dynamics, I just did a 2D model and simplified it by saying that the fluid would be moving fast enough through the pipe that...

Let's say a receiving device that requires compressed air is 1.5 miles away from the source and demands 600 cubic feet per minute. Let's say the pipes have a diameter of four inches and already contain air at 90psi. If friction in the pipes would be ignored, it would require the same amount...

Hi, I'm looking at the solution to a question on fluid flow through a rigid pipe. Original equation: \mu u = 0.25r^{2} dp/dx + Aln(r) + B After applying boundary conditions: \mu u = 0.25dp/dx (r^{2} - a^{2}) I don't understand how the constants have been solved for. Below is as far as I get...

I have a pipe that needs to be 5 degrees below the external temperature outside(eg- 45 degrees outside means 40 degrees within). I cannot remove the pipe or anything, all I can change is the what the pipe passes through, for example if it passes a block of ice then technically the pipe would...

I am trying to ascertain if a 150NB Stainless Steel pipe lagged with 50mm thick insulation would also require to be trace heated. The insulation used is rockwool. The parameters are that the pipe must not freeze solid given 5 straight days of -15 C with static flow. Wind chill is negligible. The...

Hello everyone! I'm in high school and attempting to build a ruben's tube. I am on a very strict budget and came across free brass tubing, but the diameter is 1 inch. All the tutorials I've seen use a diameter of at least 2inches if not more. Will a pipe with a one inch diameter work...

I need to figure out the best way to improve drainage of spring water flowing through my property. The water from my neighbour’s spring flows 10m through a pipe into a manhole on my side. The water level in this manhole is always 10-20 cm higher than the in and out pipes. The water then flows...

Hi all, I have a practical problem at work that I need some help with please! In the ground, there is a gas pipe that runs alongside a burst water pipe. There is a hole in the gas pipe of approx 40mm in diameter, and the water is blasting the hole with constant water pressure of 4000...

Homework Statement a pipeline which connects two reservoirs which has a water level difference of 5m. the total length of the pipe is 700m and the length of section AB is 300m. Point B is at a level of 3m above the free surface of the water in reservoir A. If the diameter of the pipe is 1m and...

I am a little confused about the pressure and hose diameter relationship. Let's say I have a pump pumping at a given pressure; I connect a hose of a certain diameter and attach a pressure gauge to the other end of the hose and get a pressure reading. Now let's say if i conduct the same...

Homework Statement "A 10m long, sloping pipe has an entrance of 100mm diameter water velocity at the pipe entrance is 4m/s and a gauge pressure is 35,000n/m^2. the pipe abruptly expands to 200mm diameter halfway along its length and the exit point is 0.5 below the entrance. The head loss due...

Homework Statement A string 40.0cm long of mass 8.50g is fixed at both ends and is under a tension of 425N. When the string is vibrating in its third overtone, you observe that it causes a nearby pipe, open at both ends, to resonate in its third harmonic. The speed of sound is 344m/s. a) How...

Homework Statement An observer listens to a vibrating string using a cardboard tube of length 1.4m placed close to his ear (one end closed). The string is excited so as to vibrate at its fundamental frequency, and the tension is increased slowly. The intensity of the sound heard by the...

Could someone please help me with this?? I am working on a problem with 2 pipes, one 100mm and one 150mm in diameter. The shape of the pipeline is a square. half is 100mm pipe and the other half is 150mm pipe. 1.If entire pipeline is filled with water, no leak and no supply, is pressure...

Lets say I have a superconducting pipe that is infinitely long. Now I place a magnet in the pipe, will the magnet stay placed in the pipe due to the meisner effect? And the magnet is in a Constant gravitational field. And the pipe is vertical in the G field.

Homework Statement I performed an experiment using a double pipe heat exchanger. Readings were taken at steady state. Cold water entered the inner tube at 9°C, and its exit temp was 81°C. (flow rate was measured). The outer tube contained steam at 133°C and this temperature remained...

Homework Statement Water flows in a pipe with speed 1.5 m/s at point 1. The diameter of the pipe at point 1 is 4cm and the diameter at point 2 is 3cm. density of water: 998.2071 kg/m^3 What's the speed of the water at point 2? Homework Equations I think you need to use this. I just have no...

Homework Statement see attachment Homework Equations not sure if these are applicable because i don't think its steady state anymore mass flow in=mass flow out sum of forces in x direction= rate of momentum in-rate of momentum out bernoulli's p+0.5ρ(v^2)= constant The Attempt at a...

Hi I cannot find an equation for a boundary layer in a pipe flow (laminar). I am looking for an equivalent of the equation δ(x)=4.91x/(√Re) that works for a flow between plates (x is the distance downstream). The thing is- I am looking for BL thickness for still undeveloped flow. I would be...

hi to everyone, i have the following question, see attached image. a vertical pipe containing water is exactly 28ft tall. at the top (A) the pipe is tight shut. at the bottom (B)the pipe is open and ends in a bowl of water. since no air can enter the pipe, the water remains within the pipe...

Homework Statement The speed of water flowing through the "influent" 4-inch diameter section of the piping system below is 3.0 ft/s. What is the volume flow rate of water in the piping system? Express the volume flow rate in ft^3/s Homework Equations The Attempt at a Solution I...

Homework Statement Water flows from a pipe at 650 L/min. a) What is the diameter of the pipe (in cm) of that pipe, if the water flows at 1.5 m/s? Homework Equations Q = V*A Now the equation for the area of a pipe is A = ∏r^2 The Attempt at a Solution Q = 650 L/min V =...

I have a basic question about light pipes - How exactly does it work? Is it like Fiber optic cable (total internal reflection)? or does it leak since the light pipe is fully made of glass.

Homework Statement Steady, laminar flow of an incompressible Newtonian fluid with constant physical properties. The area of interest in the problem is in the entrance region between two wise, horizontal parallel plates separated by distance 2B. z is in the direction of flow and x is the...

Homework Statement I'm solving a problem where a conducting pipe with a square cross section is being analyzed to find the potential everywhere in space. The pipe lays along the z-axis, so we're really concerned with the x-y plane. My issue isn't so much the general solution via separation...

I need a simple method to measure eddy currents in a pipe. Thanks.

Homework Statement Homework Equations ∇2V = 0 The Attempt at a Solution I'm guessing I need to use Laplace's equation in 2 dimensions since the potential depends on x and y. I have no idea how I would do this.

Hey guys, For my degree project this year I am designing a Vertical heat pipe to be used in a geothermal heat/power production application. I was wondering if anyone knew of some good resources about this topic. Any advice would be appreciated!

The title is pretty self-explanatory. I know the speed of the falling magnet is much slower in a copper pipe, but since the magnetic field moves, is there still some electricity generated in the process, even though the speed isn't great? Thanks!

Homework Statement The windings of high-current electromagnets are often made of copper pipe. The current flows in the walls of the pipe, and the cooling water flows in the interior of the pipe. Suppose the copper pipe has an outside diameter of 0.8 cm and inside diameter of 0.5 cm...

Well I was sitting and thinking and please confirm or dispute my claims. Let's imagine we have a copper or whatever material pipe let's say a plastic pipe with copper wire windings around it , through that pipe we blow let's say steam from a heat source that heats water to steam. Now is it...

Hi, everyone. This is my first post so I figured I'd introduce myself very quickly before I get to the problem. My name is Matt and I'm a first year engineering student at Oregon State University. I've read quite a few topics here, but this is the first time I've really joined in on anything...

Homework Statement A 5-kg object initially slides with speed V0 in a hollow frictionless pipe. The end of the pipe contains two springs, one nested inside the other, as shown above. The object makes contact with the inner spring at point A, moves 0.1 meter to make contact with the outer spring...

Homework Statement Consider a steady flow of liquid with a density of 805 kg/m3 through a rotating tube as shown in the sketch. The flow speed is V = 5 m/s. If ω = 10 rad/s, find the torque necessary to rotate the pipe. Assume a uniform velocity distribution at the exit from the pipe, and...

Water flows through a horizontal 150 mm diameter pipe with a mean velocity of 2.5m/s. The surface roughness of the pipe is 0.15mm. Determine the head loss in a 30m length of the pipe. Hints, use moody chart, Re = ρVD/μ. Been having trouble with the question, can't seem to do it.

Please see attached. I already got the answer verified for part a which is v1=1.5 m/s and mass flow rate=23.1 kg/s For part b, I'd like someone to check my answer and answer a question. Sum of forces in the x direction ƩFx=m'out * V2 - m'in * V1 m'=mass flow rate V=velocity For...

is anyone help to solve this problem? Water at a temperature of 20degree C and a pressure 8 bar enters a pipe of dia.0.2 cm.The Pipe uniformly heated with 5.0kW/m². Calculate the Temperature along the pipe for the pipe length of 20m. plot temperatuer as a function of the pipe length. m=0.5 kg/s...