3/21    Does the water get hotter faster if you open the faucet more?
        \_Ever hear of 'empirical' data? try it at home.
        \_ yes because you remove the cold water in the pipes and
           fill the pipes with the hot water from the heater faster if
           you open the valve more.
           [ the indenter was here ]
              in the pipe which means it losses less heat to the pipe and the
              surrounding.
           \_ Plus the water should also be hotter, because it spend less time
              in the pipe which means it loses less heat to the pipe and the
              surrounding.  (That's assuming you have a huge heater that can
              keep up with the consumption.)
             \_ yes, but since the water is in laminar flow, there is still
             cold water hugging the pipes so the water isn't completely
            hot until heat is transfered to the cold water hugging the pipes
            so it will take some more time.
                \_ Nonsense.  The slower flow is laminar too, and if at
                   faster speeds the flow becomes turbulent, your whole
                   bullshit argument is blown out of the water.
                  \_ the reynolds number is too low for turbulance and
                 and is mostly based on velocity:
                reynolds number = diameter * velocity / kinesmatic viscosity
                only turbulance would occur at fittings .etc. but in general
                In a pipe, water in contact with the pipe moves slower than
                water in the middle of the pipe.
                  \_ Regardless of whether the flow is laminar or turbulent,
                     the water, even at the EDGES, flows quicker if you
                     increase the flow, so it'll heat faster.
                    \_umm. definition of laminar is velocity = 0 at edge
                        \_ umm. definition of edge -> infinitesimal width
                          \_ umm. forget engineering as a practical  tool
        \_ go under your house and slap some insulating foam on those
           puppies.  instant hot showers for most of the year.
           \_ That's a good idea in any case.
           \_ Can the foam keep the water inside the pipes warm for eight
              hours or so?  E.g. when I turn on the faucet in the morning, is
              the stale water still hot?
              \_ Just buy heat on demand and stop with the annoying
                 questions. --dim
        \_ My neighbor has one of those attachments like I have at work
           that spits out very hot water from a different faucet.
        \_ Get heated water pipes.