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boundary

In physics and fluid mechanics, a boundary layer is the layer of fluid in the immediate vicinity of a bounding surface where the effects of viscosity are significant. The liquid or gas in the boundary layer tends to cling to the surface.
The boundary layer around a human is heated by the human, so it is warmer than the surrounding air. A breeze disrupts the boundary layer, and hair and clothing protect it, making the human feel cooler or warmer. On an aircraft wing, the boundary layer is the part of the flow close to the wing, where viscous forces distort the surrounding non-viscous flow. In the Earth's atmosphere, the atmospheric boundary layer is the air layer (~ 1 km) near the ground. It is affected by the surface; day-night heat flows caused by the sun heating the ground, moisture, or momentum transfer to or from the surface.

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  1. J

    Waste pipe (40mm) on Boundary wall - is this allowed?

    Hi, I am new to this forum and would highly appreciate if someone could provide a guidance pls. Ours is a semi detached property with bungalow on the other side. The previous owner of our property did a 1st floor side and rear extension around 2015. The old bathroom was with saniflo system in...
  2. P

    Boiler flue on Party wall boundary wall

    Im aware of the regulations that say you can not position a flue on a boundary wall if this blows into your neighbours garden, but does this still apply if the flue is situated 3 stories up (i.e. blowing out the gable wall in the attic) Approx 8-9meters high. Would the gasses disperse enough...
  3. D

    Condensing Oil boiler from boundary query

    Hi all I have to site a condensing oil boiler close to a boundary. Its going to be one of these Greenstar 50/70 or there abouts. The 600mm rule doesnt look like it applies, I think is 2.5 metres from the boundary as its condensing. 1) What should my distance from the boundary be? 2) Does this...
  4. M

    Flue 600mm from a surface or boundary facing the terminal

    Any one come across it were a builder has built a house and were the position they want the boiler the flue points out to a boundary. No surface there. But less than 600mm away from the boundary line between 2 properties. I am correct in saying this is not acceptable? Its mainly for nuisance...
  5. R

    Which way does the mains flow on this boundary box?

    Can anyone tell me which way the mains flow please? i have a feeling its to the left of the picture but if anyone could confirm that would be much appreciated :) I am trying to work out which is the service pipe to the house . Not very straightforward because of the pipe arrangement. I am...
  6. M

    House with gate valve as stop tap then iso valve

    I have to do abet of work to do on a house that has lead coming in to a gate valve then an iso valve. The owner doesn't want to replace in mdpe. From boundary stop tap at the moment. So to isolate the houses water supply I have the iso valve or the boundary stop tap in the road. As the gate...
  7. R

    Boiler Flue rules - help!

    Hello, I am trying to replace a 21 year old G rated boiler in my Edwardian end of terrace house. The combi boiler is in the kitchen on the outer wall. The flue exits into the street on the other side. The British Gas engineer who came by said that the flue was extending outside my property so...
  8. stani

    Termination into boundary .

    I've just been to look at a new property for our clients, our existing boiler an old Worcester combi, terminates right onto the boundary between next door, when the appliance was installed next doors wall were 3 metres away, however they have had an extension built, which now drops the boundary...
  9. S

    Boundary Box clearing

    I seem to be getting an awful lot of stopcock jobs lately and I'm having an absolute mare with the amount of boundary boxes for external stopcocks that are full of all sorts of crap. Most times I've been able to clear with my hands (with gloves on obvs) but this really isn't ideal as I'm fully...
  10. S

    Boiler flue issue, advice needed

    Hi everyone, I'm looking for some advice. Approx 4 years ago I had my boiler (combi) replaced. The fitter put the new one in exactly the same place as the old one. It is situated in my loft and the flue exits through the gable end. My house is a staggered terrace and so the flue overhangs my...
  11. I

    Prv terminating onto neighbouring boundary.

    Strange one chaps so thought I'd see if anyone has had this before. One of my customers has a problem where by their ere neighbour has a leaking prv which terminates onto there land (garden decking). now the neighbour is aware of the issue but is a tight wad so is just leaving it and not...
  12. M

    Flue terminals and Boundary Lines

    Hi chaps, I need to do a boiler swop where the old boiler is right in the kitchen next to the boundary wall of a terrace house. In the viper it says you need to be 300mm from the boundary just incase they build an extension. Is it ok to still core out closer than this and use a plume management...
  13. C

    Contractors for installing water in a field?

    I am interested in purchasing a field, however currently it does not have any water. I have contacted the water board who have given me a quote for the work that they carry out i.e. connection from water connection to my field boundary. They advised that i now need to source a contractor to do...
  14. S

    Flue positions?

    Hi As part of a contract I have to know where a boiler flue can exit the building - ie distance from windows ect so the site can be ready for the gas fitter I used to have a handy on site guide for putting stoves in boats which gave the minimum distances materials ect. Does anyone publish a...
  15. L

    Neighbours flue

    My neighbours flue from their boiler comes straight out of a party wall into my courtyard. This is obviously my land. When I asked them to move/rerout it they called in a gas engineer who said the flue was perfectly legal. They seem to be missing the point that the pipe itself may be legal...
  16. N

    Neighbours Flue over the Boundary

    Hi, I've just bought a property and am currently having work done to the place as it was in a bad state. I wish to rebuilt the current side garage for use as habitable room, however my neighbours bolier flue over hangs it. I tried to contact the neighbour by knocking on his door and so did my...
  17. T

    External Outside stopcock

    Who would be responsable for the external stop tap not working , it is located outside but within the customers boundary, not sure if its the home owner or the Waterboard? thanks
  18. woodsy

    condensing flue discharging over boundary

    Customer with current cream crackered se Halstead Ace combi. Current flue discharges into a yard of a neighbouring house. Its been a long week and just want to make sure that when i told customer that new condenser cannot discharge in same place, i am right.
  19. P

    flue termination onto someone elses boundary advice needed

    i have quoted to install a combi for combi swap but the old flue terminates on someone elses boundary and its gonna be a right pain to have it any other way, just checked in the worcester instructions and it says unless it will be a nuisence it needs to be 600mm clearence does this mean cos its...
    • plumbdoctor
    • Thread
    • 600mm advice boundary flue gonna needed neighbours position property someone
    • Replies: 17
    • Forum: Plumbing Jobs | The Job-board
  20. M

    clearing boundary box

    Hi. I am a bit of an amateur and was wondering if anyone had any tips on how to clean out sand and ruble from my external stopcock it just covers the tap head and is about 3 feet under in my 6 inch square box. Whoever did the plumbing when my flat was built decided not to bother putting a...
    • malky001
    • Thread
    • boundary difficult electric free head inside mains plumbing shower stop tap stopcock tap water
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
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