What is Pipe: Definition and 1000 Discussions

A tobacco pipe, often called simply a pipe, is a device specifically made to smoke tobacco. It comprises a chamber (the bowl) for the tobacco from which a thin hollow stem (shank) emerges, ending in a mouthpiece. Pipes can range from very simple machine-made briar models to highly prized hand-made artisanal implements made by renowned pipemakers, which are often very expensive collector's items. Pipe smoking is the oldest known traditional form of tobacco smoking.

View More On Wikipedia.org
Recent contents Top users
  1. A

    Ansys Fluent transient pipe flow

    Hello, I am doing a relatively simple problem, but i can't initialise it. I have hot water at 400K moving inside a copper pipe at 300K. I would like to see the time it takes for the copper pipe's temperature to increase to 400. However I can't seem to initialise the temperature of the pipe...
  2. M

    Pipe protuberance's effect on flow

    Hi, I've been reading over Transport Phenomena by Bird, Stewart, and Lightfoot and I've been going over the friction factor ##f##. I've gone through the whole development leading to the observation that, for time-averaged turbulent flow, when we neglect entry effects, ##f = f(Re; k/D)##, where...
  3. longz

    Pressure loss to double wall pipe (ventilation)

    Hi every body, I need help to calculate the pressure drop to double wall pipe with information as below, i understand need calculate pressure loss to the straight pipe, elbows and supports but I don't know exactly how. - Fluid : air - Double wall pipe (stainless steel) with outer pipe...
  4. T

    Need to figure out heat loss as water passes thru a pipe....

    But not for the reason or application you might think...lol I live in SE Texas, just south of Houston. It is hot as balls here in the summer. (Which accounts for three of our seasons here) My neighborhood is on a "community well" type water system, and the well is in the back of the...
  5. A

    Brain fade/idiot moment - simple question about pipe flows

    Stupid question: I have the following pipe configuration: Working fluid = ambient air Pipe1 = 6 inch ID x 24 inch length Expansion1 = 2 inch length Pipe2 = 8 inch ID x 2 inch length Fan1 = assume 200 CFM @ 2860 rpm, 0.05 inH2O Contraction1 = 2 inch length Pipe3 = 6 inch ID x 12 inch length...
  6. F

    PVC vs Copper Pipe Thermal Conductivity

    Question#1 I would like to compare a 100' length of 4" PVC pipe with air in it surrounded by Earth and/or water. What length of 4" copper pipe would equal a 100' length of PVC? Question#2 If the inside of the pipe had turbulence what length of non-turbulent 100' PVC 4" pipe would it equal? I...
  7. R

    I Amount of nitrogen needed to flush a pipe

    Hello, I am trying to solve a problem where I want to know how many cylinders of N2 (50L, 200 bar) are needed to flush a pipe filled with oil. The pipe diameter is 0.5", so the volume of the pipe is 0.133 m3 (with a length of 1050m) which is filled with oil. Behind the N2 cylinders is a...
  8. B

    Hydrualic pressure moving plug in pipe

    Homework Statement A plug with a given mass is placed in the end of a horizontal pipe to hold water at a given pressure behind it. Is there any way to calculate how far this plug would move in the x-axis if it suddenly lost it's grip against the pipe wall, and it was situated a given height...
  9. R

    Velocity of compressed air through pipe

    This started out as a thought experiment and then I realized I was stuck in how to figure it out. If I have an airsoft rifle that uses compressed air in the tank at 3000 psi. It leaves the bottle regulated down to 800 psi. It then goes into a second regulator that reduces the pressure further...
  10. A

    Transient Heat transfer from water through pipe to ground

    Hi I am trying to do a transient heat transfer calculation. The water flowing through the pipe is laminar (1 m/s, id = 0.0127 m, Re_d = 0.01) transferring heat to the pipe via convection, then the pipe (od = 0.015875 m, l = 144 m) transfers heat to the ground again via conduction. I found this...
  11. B

    How can I calculate heat loss from a pipe system in a building with 9 floors?

    halo every one... i have question . if i have pipe inside building with 9 floor's length ,and i have calorie meter between the incoming and outgoing pipe's. how i can calculate the losses of pipe if i now that temperature inside building is 22. i want to be sure that the system working normal. i...
  12. A

    Generate fluted pipe geometry in ANSYS

    I am trying to make a spirally fluted pipe in ANSYS. I made the cross section as in the attached figure and sweeped on a straight line perpendicular to plane of the cross section. However I get a sort of a drill bit instead of the required spirally fluted pipe. Is there an issue with the cross...
  13. D

    Rate of Heat Transfer of a Composite Pipe

    Homework Statement A composite pipe made of steel pipe ( ks = 16 W/m.K) of inner and outer radius of 0.5 and 1.0 cm and a plastic pipe (kp = 0.092 W/m.K) of inner and outer radius of 1 and 1.25 cm, respectively. If the inner surface of the steel is maintained at 900 °C and outer surface of...
  14. A

    What composition of steel pipe should I use

    Hello, I work in a apparel manufacturing warehouse and I'm planning to upgrade the Jacket Hanger Racks to a rotatable conveyor. So I want to insert new Steel Pipes for hanging the Jackets which will rotate. So, the length of the pipe is 370 cms / 12' 2", and the weight it will be holding is...
  15. F

    Calculating Heat Loss in Pipes with Air Flow and Water Surrounding

    I am new and have a math and finance background. Because of my work I am starting to get into engineering related questions, specifically in piping. I flyfish a lot and can give pointers to anyone that helps me with my questions. Say I have a 5-10' length of pvc, metal or copper pipe that is 4...
  16. DJones

    Question about what schedule pipe I should use for slackline

    HI All, I'm currently working on getting some anchors built for a slackline. These will be in ground and have removeable pipes to be hidden when not in use. I talked to my father who was an engineer for the better part of 40 years to get an initial design and parts list. I've posted what he...
  17. I

    Question about making a coaxial magnetic field in a pipe

    Hi, for a particular project, I would like to create a 1~2 Tesla magnetic field in a stainless steel pipe along the z axis. I was wondering if my concept would work, or if anyone had better ideas. Here's my concept. Fig1. So I got a few pipes about 1 inch in diameter. I would like to have a...
  18. Feodalherren

    Frictionless mass sliding in rotating pipe

    Homework Statement A pipe is spinning around with angular velocity ω = 2 rad/s about its fixed end. Inside the pipe is a frictionless block that is free to slide. The block is located 1 m from the fixed end of the pipe when the angle from the vertical, θ = π/2 (horizontal). What is the radial...
  19. Adam Rabe

    How Can I Solve This Fluid Dynamics Homework Problem?

    Homework Statement Homework Equations AV = AV P + 1/2*p*v^2 + pgh = P + 1/2*p*v^2 + pgh The Attempt at a Solution For a.) ... divide 3 by 0.1 because of (AV = AV) = 30 ms-1. answer is right. For b.) I am stuck on this one. I tried using the 2nd relevant equation above but i can't seem to...
  20. P

    How to measure the air pressure of a pipe without having water resistance

    Hello, I'm having a question regarding the sensors and the techniques in fluid mechanics. Since my skills are amazing in this field, here I'm asking you questions xD I want to measure the air pressure of this tube/pipe (P1,P2,P3). This pipe will be flushed with water and then with compressed...
  21. A

    Temperature on the outer surface of insulation

    This seems basic, but I'm stuck. Look at the attached picture. I'm trying to find the temperature on the outer surface of the insulation. Is it not possible because I do not know the rate of heat transfer? How do pipe designers know the required thickness of insulation needed to reduce to a...
  22. Muaadh

    I Application of resonance in one end closed pipe in real life

    Hello, My name is muaadh. I had an experiment in Physic about resonance in one end closed pipe. Our homework is to find applications in real life about this experiment. This photo of our experiment.
  23. D

    Would the velocity of a fluid increase right after exiting a pipe into open air?

    If you have an non-viscous incompressible fluid flowing in a pipe whose static pressure is higher than atmospheric pressure, then after exits the pipe will the dynamic pressure increase? The static pressure of the fluid right after exiting should decrease because it should be equal to the...
  24. S

    What is the speed of air flow in a pipe driven by compressed air for 12 minutes?

    Homework Statement A tank with a 25.5 litre capacity contains air compressed into 355 atmospheres used to drive a torpedo by expansion into an engine via a pipe of diameter 0.08cm. A mechanism ensures that the gas flows to the engine at a constant rate and any cooling of the air during...
  25. T

    How Long Should My Double Pipe Heat Exchanger Be for a 22kW Capacity?

    I'm trying to design a double pipe heat exchanger for two different water lines. One line is chilled water of approximately 7degC and the other is chilled water return from an air handling unit, of around 12degC. I want to design this heat exchange for a capacity of approximately 22kW. The part...
  26. KoontzyN

    Pressure at the bottom of a glass pipe?

    Homework Statement Given a cross sectional area of A=10cm^2 1kg each of water ( ρ = 1000 kg/m^3 ), olive oil ( ρ = 800 kg/m^3 ), and mercury ( ρ = 13600 kg/m^3 ) are poured, and allowed to settle. What is the pressure at the bottom of the pipe? Homework Equations F=PA P=Po+ρgd The Attempt at...
  27. P

    Exhaust pipe diameter question

    Homework Statement The engine turns at 3000 rpm at this speed. The engine capacity has a displacement of 1.2 litres: this means that 1.2 litres of exhaust gas is expelled from the motor (into the exhaust manifold) every two* revolutions. Further assume that the gas leaves the exhaust pipe with...
  28. Alanay

    Can magnets be used to send a metal ball through a pipe?

    To elaborate more on my question: Is it possible to send metal balls through a pipe with magnets arranged a certain way which could hit a target with force. I've seen something similar done before but I think the ball was also a magnet, is that the only way possible?
  29. Undacuva

    Why Do Generators Use Coils Instead of Pipes?

    Hi, I understand you can induce an electrical current by passing a magnet through a copper pipe. If so, why do generators (and motors for that matter) use coils in stead? Do coils allow a stronger current or greater efficiency? Where can I go to find out the most energy-efficient design for a...
  30. N

    Wavemaker in half pipe governing equations & boundry conditions

    Hi guys, I am kind of stuck in this assignment. I have to design a flap wave maker in a half pipe (L=35m,Water height 0.5 m )I have read a lot about linear wave theory and another theories but all these involves wave tanks with a planar bottom so what I want to know is how does the curved bottom...
  31. Brage Eidsvik

    Terminal velocity of fluid in pipe

    Hello, How do you calculate the terminal velocity of a fluid through a pipe. My problem includes turbulent flow, very high reynold number, and water (incompresible).
  32. Dileep Ramisetty

    Tank outlet velocity exit pipe cross-section area dependence

    Sir, actually in a tank by the toricelli's law and also from bernoulli equation, we have outlet velocity as V= (2*g*H)^(1/2). In the case 2, I have closed the pipe exit partially with hand and observed a higher velocity than case 1, in practical. but when I applied the bernoulli...
  33. G

    How to calculate stress on a pipe wall

    I have a PVC fitting that keeps cracking. The fitting consists of 2 parts. One piece is placed over the end of a flexible PVC ribbed hose, and the other is inserted inside the hose. The 2 parts act as a compression fitting to attach to the end of the hose. The hose typically has an outside...
  34. M

    Can a gravity fed pump effectively draw fluid from a tank at a higher elevation?

    Hello, I have a general problem. I have a tank sitting at elevation of 63 feet. With 24 inch pipe to 1400 feet away from the facility. The facility is sitting at 59 feet. To get to our vertical can pumps suction we need to run the pipe up 7 feet for 150 feet of 12 inch pipe and then drop down...
  35. S

    Working out heat transfer flux in a pipe

    1. Question 2. The attempt at a solution Now I'm not sure where to go next? Do I work out the local heat transfer coefficient at 1.2m or just the heat transfer coefficient? Using h = Nu × k/x or h = Nu × k/d Thanks, Sam.
  36. B

    Back pressure on a pipe by squeezing it shut

    Hi all, I'm new to the forum and was after a bit of guidance. At work we are looking into purchasing a new dosing unit, however I'm unsure if the design that has been drawn up is going to work. The units design revolves around the principle that a flexible tube is compressed closed by...
  37. M

    Flexible Pipe Motion: Explained

    While taking shower, I turned on the shower tap accidentally when the shower head was resting on the floor. The flexible pipe thrashed around like a berserk snake. Explain this behavior
  38. T

    Finding the flow rate through an open-end pipe

    I have a basic question for my own understanding of things, Consider a straight horizontal piece of Ø15 mm pipe (inside), 20 meters in length, with 5 bars static pressure connected to a water main. Trying to find out what the flow rate through the open end of the pipe will be, doesn't seem to...
  39. N

    Cantilever Pipe Assembly - Statics

    To simplify my situation, I am installing a horizontal cantilever pipe (30” length, 3” nominal diameter) which will be connected to a vertical pipe (3” nom diameter, acting as the wall) by a T-connection. See the diagram below. At the end of the cantilever the pipe bends up at 90 degrees for...
  40. SalusVF

    Air velocity inside a pipe (natural convection)

    Hi guys, I'm doing some research in papers and literature to solve this problem but I've not found anything useful. I want to know the air velocity inside a pipe by the only effect of natural convection. I've attached a picture of the system right here: I hope you can help me to find the...
  41. E

    Fluid Mechanics Theoretical Pipe Diameter

    Homework Statement I need to find the pipe diameter or mean velocity. Q= 0.01m^3s Density= 960kg m^3 Viscosity = 0.081 Pa s Max Velocity = 1.8 m s Homework Equations Mean velocity= 4Q/pi.D^2 The Attempt at a Solution I have two unknowns in this equation so I'm unable to find D or Mean...
  42. A

    Which is better for structural support PVC pipe or plywood?

    I'm building a structure that will weigh approximately 200lbs (100kg) but that is only for the shell of the structure. So to support it I want something strong with as little deflection as possible as well as being as light weight as possible and I've narrowed down my options to PVC piping or...
  43. A

    Understanding pipe ''head loss''

    Homework Statement I am trying to understand a problem that I made for myself (although this is based on other problems I've encountered). We have a tank (reservoir) 2.9534 m in height and a head loss of 2.88 m from beginning to end; the loss is due to friction etc. There is discharge to...
  44. R

    Equation Needed for Calculating Fluid Pressure In a Pipe

    A friend is planning to utilize a local stream to create electric power. The source of the stream is a small pond. He plans to have a 5 inch pipe start at/near the bottom of the pond and this pipe will follow the stream approximately 1056 feet to a culvert where he wants to put the generator...
  45. T

    Pressure Gradients along an angle pipe

    I have a high pressure volume coupled with a low pressure volume by a pipe and valve . If the pipe was straight I would expect the isobars of the pressure gradient to be parallel to the pressure differences and perpendicular to the pipe , I would expect a reaction force (red arrow) on the wall...
  46. S

    Height block reaches on accelerating quarter pipe

    Homework Statement A block in the shape of a quarter circle moves at constant acceleration across the floor. At some moment a small block of mass m, which is at rest with respect to the floor, is placed atop the horizontal part of the large block. There is no friction in this problem. Assuming...
  47. G

    Pipe Flow Calculation: GPM Through Pipe Level Section

    I used to have a slide chart that gave gpm through a level section of pipe (1/2" - 6") by measuring how long the exit stream was when it had dropped 4". Imagine a framing square with the blade on the pipe and the tongue hanging down in the stream. Slide the square out until the stream is...
  48. B

    What Is the Minimum Vacuum Pressure Before a Stainless Steel Pipe Collapses?

    I have a length of pipe where air is being pulled through by a high powered fan at one end. The pipe is stainless steel, outer diameter is 100 inches. the thickness is 0.125 inches. I need to know what is the minimum vacuum pressure inside the pipe can be before the atmospheric pressure will...
  49. E

    Calculating Local Heat Flux in a Pipe: Is h = Nu*(k/x) the Correct Formula?

    I am a little unsure how to get started with a homework question. Essentially, I have to calculate the local heat flux at a distance 1.2m (x) along a pipe. I have the fluid's properties and have calculated the Reynolds number, for which I've determined the flow to be turbulent and therefore do...
  50. B

    Thermal expansion of a pipe with wall temperature gradient

    I have a pipe holding liquid at 80°C. The outside atmosphere is -2°C. The pipe gets a temperature gradient over the wall thickness. The outside fibers will thus restrain the inner fibers from expanding. I would like to know the increase in the inner dia of the pipe. I have found temperature...
Back
Top