What is Vessel: Definition and 224 Discussions

A research vessel (RV or R/V) is a ship or boat designed, modified, or equipped to carry out research at sea. Research vessels carry out a number of roles. Some of these roles can be combined into a single vessel but others require a dedicated vessel. Due to the demanding nature of the work, research vessels are often constructed around an icebreaker hull, allowing them to operate in polar waters.

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  1. R

    Question about liquid flow into a vessel, is it going in?

    Liquid is being pumped into a vessel then it leaves and recirculates through the pump. I have calibrated the pump by measuring the amount of fluid being pumped through the tube (not into the vessel). However I have noticed at low flow rates the liquid level at the inlet is only half full! That...
  2. R

    ASME PV Calc open source software for vessel MAWP calculations

    Does anyone know if there is an open source (or relatively inexpensive) software that is roughly equivalent to PV calc. Specifically that uses ASME formulas to calculate MAWP or vacuum ratings on a vessel?
  3. J

    Can a Bubbler Effectively Mix a Release Agent in a Sealed Vessel?

    Good Morning everyone, I am working at an industrial urethane plant, and I am having some issues with mixing a release agent. The "RA" is distributed by a robot , and fed by a standard pressure pot. This chemical needs to be in constant suspension and our attempts at a propellor driven system...
  4. M

    MHB Rate of Water Rise in Cone-Shaped Vessel

    a vessel in the shape of a cone is standing on its apex. water flows in at a steady rate, of 1m^3 per minute. the vessel has a height of 2m and a diameter of 2m when the vessel is 1/8 full find the rate at which water is rising v=1/3 pi r^2 h however i can't differentiate this
  5. King_Silver

    Temp. rise that will cause liquid to fill vessel completely

    I've a problem with a question regarding a closed spherical storage tank of 30m^3. Its filled to the 99% mark with Nitric acid and the tank is made of stainless steel. I'm trying to determine the temperature rise that will cause the liquid to completely fill the vessel. I know that as the...
  6. V

    Liquid in which vessel boils first?

    Hello , Above question came in a national level grade 10 exam recently .If suppose ΔQ amount of heat is transferred to B in time Δt , then how are we suppose to relate that to heat transferred to A . Should the rate of heat transferred to B be equal to that transferred to A ? I am attaching...
  7. K

    Thin-walled pressure vessel, hoop stress Question

    http://www.efunda.com/formulae/solid_mechanics/mat_mechanics/pressure_vessel.cfmaccording to the text above, we assume that force acting on the thin wall is p*2pi*r^2 whcih is the internal area of vertical slice. But I am not sure why the area has to be 2*pi*r^2. I mean, why pressure on the...
  8. A

    I Static Problem for Upright Vessel

    Hey all, I'm currently working on a problem where whether an upright vessel will be knocked over by wind needs to be determined. The vessel is essentially an upright cylinder with a skirt on the bottom. I've attached a link to a blank diagram of it. I know how to calculate the force from the...
  9. A

    How can I calculate flow rate for leaking pressure vessel during maintenance?

    I work in the oil and gas industry and frequently encounter an issue involving isolation valves that do not seal 100%, and that begs me to ask the following question... I often need to isolate particular sections of piping so that a segment can be opened/disassembled for maintenance. When I...
  10. B

    Force exerted by a agitated fluid on vessel wall

    How can I calculate the pressure exerted by a fluid on the walls of the vessel that is being agitated. The vessel is not pressurised. I have to calculate the resultant pressure on the walls to calculate the thickness of the vessel walls.
  11. serenahalterman

    Pressure Vessel Design Question

    Hello, I am replacing an existing ASME Section VIII Division 1 column. The U-1 states it is designed to 240psig @ 650degF, but does not say anything about being designed for vacuum conditions. The SIS for the column states that it is safe to operate under full vacuum. The SIS is not a code...
  12. R

    How can I calculate total drag on a multi-hull?

    I was given the task to create a hull which must be propelled by human and solar power; I have found it difficult to obtain existing hull designs with their respective coefficient of total resistance so I am looking for a way to calculate the total hull resistance for a hull of my own. I...
  13. A

    How Can I Create Water Pressure in a Vessel Without a Standard Pump?

    Hi there all physics geniuses. I come looking for help. I need to create water pressure in a vessel in the easiest possible way. And not by using a standard manual pump to pump in air. I've come up with a syringe-spring type system but it's flawed as the spring will rust... Also I've...
  14. E

    Impact force of pressure fired vessel (Help needed)

    Ok folks I have a down hole oil tool which seals a well bore. it weighs 63KG (139 lbs) I have worked out that it is being loaded up from above with 53879 lbs. by applied pressure/ hydrostatic pressure if it was to instantly release and drop 7m what would the impact force be on a restriction...
  15. O

    Need Help With Thin Walled Pressure Vessel Problem

    Homework Statement My professor has given us the solutions to the problem, but I am having a hard time decoding what exactly is going on from the solutions, especially in parts B and C. For Part B: I understand where the numbers are coming from and that this is a force balance problem...
  16. A

    200,000 psi Hydraulic pressure vessel wall thickness?

    I'm Having a part machined with a cylinder shape approximately 14 inches in length with a cylinder hole in the center with a diameter of .930 . I have no idea how thick the cylinder wall needs to be. I have looked up and used hoop stress calculators online but I do not understand if they take...
  17. B

    Storage vessel stress analysis using ansys

    I have to model a storage vessel in ansys and perform stress analysis for it. I have no idea about which element types I will need for the analysis. I have calculated the design dimensions for the vessel. I am a beginner at ansys and know only how to deal with simple structural and thermal...
  18. eryksd

    Best material for diffusing moisture into a closed vessel?

    Anyone have any suggestions on other [mold-proof] materials that might be good to diffuse moisture (distilled water) into a vessel? For a project, I am trying to create a re-humidification vessel to re-humidify certain materials that have dried out, and am trying to think of the best material...
  19. B

    How do I design a pressure vessel with given data?

    I have been asked to design a pressure vessel and the data given to me for the problem is - content -oil of density 0.9 g/ cm3. material with ultimate tensile strength of 70,000 psi. factor of safety 3. volume 50 m3. How do I calculate the internal pressure and diameter, which I will need to...
  20. M

    What is the Relationship Between Radius and Pressure in a Pressure Vessel?

    Homework Statement The problem is to calculate the required thickness of the shell of a pressure vessel, given that the design pressure P is 400 psi, the strength S is 15800 psi, the corrosion allowance CA is 1/8"and ##R_{design}## is to be found by iteration. Homework Equations...
  21. A

    Why Wet Crude Needs Surge Vessel And Dehydrator Desalter

    Hi We have 2 type of crude wet crude and dry crude . My questions is 1- is the different between these 2 is the water percentage ? is this the only different ? 2- During the separation the crude the dry crude go through the separators then to boot then to flow suction tank. but why the wet crude...
  22. G

    How Do You Calculate Shear Stress in a Coronary Artery?

    Homework Statement Blood supply to the heart occurs through coronary arteries. Consider one of the arteries to be 2.5 mm in diameter and 3 cm in length. The average velocity of blood flow through that artery is 1.5 cm/s. Assuming the density of blood to be 1.056 g/cc and viscosity to be 3 cP...
  23. T

    Help with a problem to design a vessel

    The problem involves a a heater and three jacketed reactors. The reactors are heated by water supplied by the heater. Determine the heater size(in kW) required for this service if the heater is to be sized so that it is large enough to handle all three reactors when they operate at full...
  24. O

    Pressure inside a heated sealed vessel

    Please can you help me de find out the calculation steps leading to the partial pressure inside a heated closed vessel with 25 ml total capacity but filled 20mL with aquous mixture of 2 acids(HNO3/HF ;1/3)..I think to simplify the problem we could at a fisrt approximation assume that the mixture...
  25. D

    Temperature increase with pressure in an open vessel?

    Hello all, new here please excuse if this is in the wrong area of the forum. My question is does temperature increase in a linear fashion when pressure is added? What formula can be used to accurately monitor temperature increase as pressure is added? Imagine having a set temperature, let's...
  26. F

    Air ingress into a furnace vessel

    If a furnace at 500 Celcius and 500 bar was to lose pressure from a breach (pipe break) resulting inert gas escaping the furnace would loose pressure and reach equilibrium pressure with outside room pressure. When equilibrium pressure is reached how would the outside air enter into the...
  27. M

    Pressure of supercritical water inside a vessel

    Homework Statement I'm trying to revive an old project a previous grad student had been toying with. Essentially, the reaction requires a sealed quartz tube (with a dilute acid) to be placed ("free-floating") inside a thick walled-autoclave capable of well over 40,000 PSI. The reaction is run...
  28. F

    Calculating pressure drop from a pressure vessel leak

    THIS PROBLEM WAS MOVED FROM GENERAL PHYSICS TO THIS FORUM BECAUSE OF ITS HOMEWORK-LIKE NATURE. SO THERE IS NO TEMPLATE. Pressure vessel has a electrical (coiled) furnace inside. A pressure vessel @ 550 bar @ 500 C containing argon has its gas inlet pipe (1 inch ext Diameter) that has come...
  29. AdityaDev

    Vessel of water under free fall

    When a Vessel of water is under free fall and there is a hole in the side of the vessel, why does no water come out of the vessel? (its given in my textbook that pressure exerted on sides of vessel is zero. But what does the horizontal force have to do with the vertically acting force due to...
  30. R

    Maintaining liquid level inside a vessel of boiling liquid

    What's a good way to maintain liquid level inside a vessel of liquid that's heated via a jacket & has a feed pipe. Feed pipe is approx. 1/2 inch dia & expected flow in is about 300 Litres / hr Would a ball cock work with all that boiling & bubbling happening around it? I prefer a purely...
  31. D

    What are new ways to open a cylindrical pressure vessel?

    I am currently helping one of my old physics professors and his Phd student designing a pressure vessel for ultra-sciencey detector (still figuring out the theory behind it all). So far we have the general vacuum tank that opens on the ends, with the pressure difference holding the ends on...
  32. S

    Vessel with liquids having different refractive index

    1.Problem: A vessel is quarter filled with a liquid of refractive index A. the remaining parts of the vessel is filled with an immiscible liquid of refractive index 3A/2. The apparent depth of the vessel is 50% of the actual depth. the value of A is? 1)1 2)3/2 3)2/3 4)4/3 Solution: 1...
  33. T

    Vertical distance of water inside an downward vessel

    Homework Statement A vessel of internal volume 9 m^3 is lowered with its mouth downward into fresh water lake until the volume of the air in the vessel becomes 5 m^3. Given that the atmosphere pressure is 760 mmHg, what is the verrtical distance of the water level inside the vessel from the...
  34. AdityaDev

    How does heating a gas in a vessel with a piston affect the pressure inside?

    If I fill a cylindrical vessel with a gas and put a piston of some mass on top of it and slowly heat the vessel, the piston will move up. But does the pressure inside the vessel change? ( vessel is insulated).if pressure doesn't change, how does the piston move up? Pressure on piston : ##P -...
  35. K

    Pressure vessel Design - Splay out concern

    Dear Members, The existing design for the pressure vessel is an end cap bolted to the body which is not designed to any pressure vessel code. Currently I'm trying to qualify this pressure vessel to PD5500 code. Due to the derated allowables in the code i couldn't go with the bolted...
  36. T

    Pressure Vessel Maximum Diameter Calculation

    Homework Statement The strength of longitudinal joint in Fig. 1-17 is 33 kips/ft, whereas for the girth is 16 kips/ft. Calculate the maximum diameter of the cylinder tank if the internal pressure is 150 psi. - See more at...
  37. C

    Determining the amount of liquid water in a pressure vessel

    So there is a mass of 100kg and volume of 1m^3. (Distiller water) That's 0.01 m^3/kg How do I calculate the percentages?
  38. T

    Osmotic Pressure within pressure vessel

    Hi could someone point me in the right direction about the following scenario A high pressure vessel is 100% filled with an incompressible liquid A membrane separates two sides with differing concentrations one (one may be zero) of an impermeable solute. What would occur ? My feeling is that...
  39. P

    Calculating the average force of a molecule in a vessel

    Homework Statement Suppose an oxygen molecule traveling at the speed of 484 m/s bounces back and forth between opposite sides of a cubical vessel 0.1 m on a side. What is the average force the molecule exerts on one of the walls of the container? Homework Equations F=p/t The Attempt at a...
  40. S

    Vasoconstriction (constricting blood vessel) and flow rate?

    I was wondering why when the blood vessels constricted the speed of the blood decreased? I thought that since the flow rate has to be the same, the volume of blood that reaches a smaller area from a bigger area will increase in speed and hence decrease in pressure? Perhaps is this due to the...
  41. R

    Finding speed of water leaving a pressurized vessel

    Homework Statement A large tank of water has a hose connected to it, as shown in the figure. The tank is sealed at the top and has compressed air between the water surface and the top. When the water height h has the value 3.50m , the absolute pressure p of the compressed air is 4.20 ×105Pa...
  42. D

    Water Pressure in a Sealed Vessel

    Hello, I am a PhD student in chemistry, and need to determine the pressure of a reaction to be carried out I have a steel pressure vessel with an inner Teflon container (total volume = 270 mL) which is placed in an oven at 250°C. I wish to put 240 mL of water into this container (along...
  43. S

    Designing an Elastomer Pressure Vessel for Constant Pressure Applications

    Hello Physics Forum. I'm looking to use the vapor pressure of a liquid to apply a constant pressure to a piston. The vapor pressure of the liquid is higher than the pressure I'm looking to exert (vapor pressure is ~16psi and I need to push with a pressure of 5.5psi). I'm thinking of using an...
  44. K

    Fluid flow out of pressurized vessel

    I have a non-rigid vessel holding a fluid with a tube for fluid flow out. It is initially at equilibrium pressure with the atmosphere. (Think a water bladder for a camelback hydration system) A pressure is then applied to the bag to cause fluid to flow out the tube. Is there a way to relate the...
  45. P

    Pressure vessel ideal gas calculation

    Hello all, As part of a research project, I am trying to calculate the amount of water/dry ice I would need to put in a cylindrical pressure vessel to obtain an internal pressure of ~100 psi at 200C (from room temperature, ~23C). I haven't had to do a calculation like this in awhile, but...
  46. M

    Thick walled spherical vessel under external pressure

    Homework Statement Hello.:smile: I need help to design a spherical vessel submarine with minimum mass which can withstand water pressure at depth of 8000 meter. It must satisfy this conditions: 1. vessel shall have minimum interval volume of 10m^3 2. outer diameter must less than 5m...
  47. mattyboson12

    Calculating Wall Thickness and Bolt Diameter for a Spherical Pressure Vessel

    A spherical pressure vessel of internal diameter 2m is constructed by bolting together two hemispherical domes with flanges. Assuming that the number of bolts used to join the two hemispheres together is 12, determine the wall thickness of the dome and the diameter of the bolts, if the maximum...
  48. R

    Pressure vessel exploding within an atmospheric chamber

    I am currently investigating pressure test safety with my current employer. Currently we test pressure vessels inside steel test containers, see attached pdf. At the moment Boyles law is used to calculate the resultant pressure increase inside the steel container if the pressure vessel was to...
  49. R

    Optimum dimension for a cylindrical vessel subject to external pressur

    While doing some ASME code calculations for a pressure vessel subject to external pressure I was wondering what'd be the optimum L/D ratio for a vessel that is subject to buckling under external pressure. For a given volume & Pressure. Could a general L/D ratio be derived or would it change...
  50. K

    Designing pressure vessel

    Hi I was wondering how to design the horizontal pressure vessel on twin saddle that is not a symmetric shape using PD 5500 code. For example, Annex G of the code shows how to design with twin saddle, but it is only approach with the symmetric pressure vessel. Anyone has an idea or any...
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