Pipe Definition and 1000 Threads

Homework Statement A pipe of radius R is maintained at temperature T. It is covered in insulation and the insulated pipe has radius r. Assume all surfaces lose heat through Newton's law of cooling \vec{J} = \vec{h} \Delta T, where the magnitude h is assumed to be constant. Show that...

Hey everyone, I've got a problem here and I'm looking for a simple solution. Basically, I need to keep a consistent hydraulic head between two points of a vertical drainage pipe. I have a sump pump and two electronic float valves (that I purchased separately). What I want to do is wire the...

I was walking through my garage and bumped into a pvc pipe. The pipe fell over and I was wonder how I could calculate the force needed to push the pipe over. The pipe is 40 in. tall and has a 4 in. radius. The force would be applied perpendicular to the pipe and at the very top of it. any help...

Homework Statement A very tall pipe is partially filled as shown. (A vertical pipe is filled with water about halfway, and .85m of air is in the pipe to the open end. The bottom is closed). |**| ^ |**| | |**| .85m |__| _|_ |__| |__| |__| |__| |__| ^^ My attempt at a drawing, where...

I understand that the volume of a pipe is the circle pi x r (sq) x height I have worked out the volume of water inside a pipe running from the shower to the boiler (cold water that will run through the tap before the hot water arrives) and it does not make sense. The pipe is 22 mm; the...

Hey, I was wondering what were would happen to the fluid flow or if this would cause any structural problems to the following case. A vertical pipe of 150mm diameter and roughly 3 metres in length is at the bottom of a large tank. At the bottom of the pipe is a coupling which leads to...

Hi As fluid enters a pipe and progresses further down, does the shear stress at the wall reduce whilst the boundary layer increases and viscous forces take over? Thanks

A hemisphere shaped tank with vertical outlet pipe is full of mysterious liquid. Find the work required to pump the mysterious liquid out of the outlet. The density of the mysterious liquid is 300/98 kg/m^3. [Radius is 2m and vertical pipe is 1m] W= F*d =m*a*d =D*v*a*d D=300/98 kg/m^3...

Dear Physicists, I'm not sure if my question qualifies as coursework, but here it is anyway: I'm taking ENGR-101 this term, and for a group project my group chose the design of a solar water heater. I'm trying to find a formula to calculate our design's efficiency, and when I search for...

http://flexpvc.com/cart/agora.cgi?product=PVC-6-ways Problem: Find the surface area (internal and external) and volume of that (the 6 ways PVC pipe in the link) if the radius of the cavity is .5 cm, the inside of the pipe is completely smooth, and the thickness of the pipes is .05 cm. I AM...

Hello, can someone tell me how the reynolds number for flow through a pipe change along it's length? Is the only method that the boundary layer gets thicker along the pipe so the freestream velocity increases? Assuming no gas temperature change along the pipe's length. From thinking of the...

I need to calculate whether a steel pipe above the ground, 1500mm OD and 6mm wall thickness, will fail under a vacuum of 3000 Pa. How would I go about doing this?

I am looking for software to calculate flow rate, pressure drop, flow rate and temperature change in facility piping. Any suggestions?

Yes, first to say that this's really a basic matter but I've found all around a week & still facing difficulty, hope someone has patient to help me an answer then i can go further myself :wink: As in the attached picture, a few ones have done their calculations & showed the different wall...

I am a novice pipe designer and I have a project starting on Monday. I have to design a Filtered Water Supply system. The pipe is SS and the majority of the header is located outside. The engineer said no insulation is needed if we put a recirculation system in. He says by keeping the water...

OK, if someone could please help. I need a GENERAL rule for finding cfm in pipe 120psi at source 1/2in copper pipe 10ft drop 100ft of pipe can someone give me a VERY simple equation on how to figure out the cfm capability of this pipe? I don't need a complex long equation, i...

I have a centrifuge with hydraulic lines on the arm. I need to calculate the pressure that will be developed at the end of the centrifuge arm in the hydraulic lines. The radius of the arm is 3 meters. At the end of the arm the G level will be 100g. Obvioulsy the g level at the center point...

i have this question which asks me to find the average flow velocity in a pipe, BUT based on flow rate relation and not statistical average what is the flowrate relation?

Pressure In a Horizontal Pipe - Please Help! Homework Statement The pressure in a section of horizontal pipe with a diameter of 2.40 cm is 143 kPa. Water flows through the pipe at 2.90 L/s. If the pressure at a certain point is to be reduced to 101 kPa by constricting a section of the pipe...

Homework Statement Please note this is for my own understanding -- I am no longer in school! I simply cannot find this addressed in introductory texts. Suppose you have a long pipe of constant cross-sectional area with a heated section in the middle. The system has flowing gas such that...

Homework Statement I'm having a real hard time on the last homework question for this week for my Uni Physics I course. Here it is: Top-fuel dragsters can accelerate from rest at a rate of about 5g. If this does not sound impressive, consider that for most automobiles the friction between...

Homework Statement water flows steadily with negligible viscious effects through this pipe. the 4-inch diameter section of the thin walled tubing will collapse if the pressure within is at 6 psi below atmospheric pressure. determine maximum h so that the tube won't collapse. final...

Homework Statement The water supply of a building is fed through a main pipe 6.00cm in diameter. A 2.00cm diameter tap is located 2.00m above the main pipe. When the tap is turned on it fills a 25.0L container in 30.0s if no other taps are turned on at the same time. a) What is the speed at...

Hi! I'm trying to model a vacuum pipe on Ansys. I've already modeled it using an isotropic material, assuming its a plane strain problem (infinate pipe), but now I want to use a laminate structure composed of an orthogonal material such as nomex (honeycomb) with a seal tight layer of Al or...

I am trying to get some help in sizing my exhaust pipe for my 1997 Pontiac Trans Am WS-6 Can anybody point me in the right direction for equations? I pulled out my Marks handbook hoping it would help, but I couldn't find anything I have been thinking of doing this as a gas dynamics...

I wanted to know how the magnetic field of a solenoid would be affected if a copper/iron pipe section was put into its center. In other words, what would the resulting magnetic field be if I simply wrapped a coil around a metal pipe section without removing the pipe afterward? Will there be...

Consider a pipe. One end of it (hole) is malleable, in that we can make it larger so that the cylinder adopts a conical shape (yet the other 'hole' does not change). If one were to apply suction at one end of the pipe, with respect to air flow, how does the pressure gradient vary within the...

Homework Statement A vertical steam pipe of diameter 8 cm and emissivity e=0.8 has it's surface at 950C. The surrounding air and the temperature of the room and things in it are at 270C. What is the heat emission rate H from the pipe, for meter length, by radiation? Homework Equations...

Homework Statement A vertical steam pipe of outside diameter 7.5 cm and height 4 m has its outer surface at the constant temperature of 950C. The surrounding air is at atmospheric pressure and at 200C. How much heat is delivered to the air by natural convection in 1 hr? Homework Equations...

I am trying to formulate a plug flow for section of my model. In my model, I've series of CSTR that are linked with the plug flow. The output of the plug flow model is the CSTR model. My main focus is blending CSTR and plug to replicate a residenc time distribution. However, i need a plug flow...

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...

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...

Hello everyone, Thank you to all who offer their help. Homework Statement If the volumetric output of the pump were increased, keeping the pipe diameter constant, would the pressures at A, B, and C increase or decrease? Would the heights within each column at each location rise or fall...

Consider a vertical pipe partially filled with liquid. The pipe is open at the lower end and closed at the top. See the attached picture. Will the liquid fall out or not? In a small diameter pipe a stable meniscus will form due to surface tension and prevent the water from falling out. In a...

Fluid Dynamics - Multiple Pipe System Need Help Please! There are 2 pumps at 2 locations with pipes (12") running from each of the pumps that are to both tied into 1 pipe (16"). In order to tie the 2 pipes into the one pipe there will be a 90 and a y fitting. The 16" pipe will then continue...

I need some help estimating the heat transfer of a system. If I have an exposed length of pipe with a dynamic fluid moving at a constant volumetric rate through a very hot room, what equation is most appropriate to calculate the exit temperature of the fluid? Given: Initial temperature of...

Homework Statement An oil having a density of 833 kg/m^3 and a viscosity of 3.3*10^-3 Pa.s is pumped from an open tank to a pressurized tank held at 345 kPa gage. The oil is pumped from an inlet at the side of the open tank through a line of commercial steel pipe having an inside diameter of...

Mass Flow through a 1.5" Pipe @ 300kpa Hi, I'm having some trouble with finding the "choke" point of a 1.5" diameter pipe. Conditions: 300 kPa 383 deg K 1.5 in D I've tried using this little guy, http://www.grc.nasa.gov/WWW/K-12/airplane/mflchk.html, with the Mach = 1, and only...

Hello, I'm currently doing a project were I have to design a tube through which a fluid will flow at > 10 m/s. I am validating my calculations and want to use the correct roughness values. The material is a plastic deposited using rapid prototyping. I have measured: Ra = ~7.5 - 8 Rz =...

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...

Homework Statement every where we require at least 3 variables out of 4(l,d,q,hf)l=length,d=diameter,q=flow rate, hf=head loss due to friction. assume water and e=0.02(roughnss coeff) what shall happen if 2 of them are known and remaining 2 unknown ex.known=l,d; unknown=hf,q; we also know...

I'm looking to buy a book or three on pipe stress analysis and design. If you work in this field, please make some recommendations for me. Thanks,

Good day, My question relates to the use of a pressure reducing station (pressure reducing valve) in a steam system. As those involved in the design know, pipe sizing is carried out starting with the furthest point (the most demanding point of consumption) and sizing shall start from that...

I have an "odd" use for pvc pipe. My house is made exclusively of styrofoam and plastic. (and a geodome to boot) I need to stick with this as any other material that was used has failed miserably (wood and steel mainly) my question is, how much weight can a 10' piece of 3" schedule 40...

I am trying to fit a vacuum pump at one end of a pipe system and a cylindrical container with a size that has minimal clearance with the inner pipe wall would be inserted at the inlet to the pipe system. The purpose of the vacuum pump is to create a pressure difference so that the lower...

Homework Statement A long, straight copper pipe of inner diameter 16mm and outer diameter 24mm carries a current of 100A. Calculate the magnetic flux density at distances i)5mm, ii)10mm and iii)15mm from its axis? Answer : i)0, ii)9*10^-4T iii) 13.3*10^-4T Homework Equations I...

I'm starting a project involving a venturi and water, and for the venturi, I need the water pressure to be around 7-10 psi. This means for my water pump, the head height must be around 15-20 ft. Most pumps that fulfill this requirement are either too expensive or are too powerful for my...

Evening out turbulence in a 3" pipe Hi folks, I have a small problem. In my car I'm building new pipes for the pressurized air. On a straight pipe there is a MAF sensor (Mass Air Flow). It consists of a hot wire and a temperature sensor. After the pipes were redone and the MAF sensor was...

Homework Statement Describe how a venturi device for measuring the flow of water in a pope works and estimate the slowest flow rate such a device could be expected to measure using 20% of cross sectional area constriction and a mercury manometer. Homework Equations A1V1=A2V2 I also know...

Homework Statement The following question is from ExamKrackers Physics [an MCAT prep book]. An ideal fluid with specific gravity of 1.0 is passed through a pipe. Along the length of the pipe shown above are attached 3 vertical pipes which are sealed off as shown above. If now a different...