Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Two tank system

  1. Feb 23, 2016 #1
    I am currently working on something and I would like to know something. When we connect two tanks and we have water flowing into Tank 1.
    Is it possible to make a connection between Tank 1 and Tank 2 so the water level in Tank 2 is higher than water level in Tank 1?
     
  2. jcsd
  3. Feb 23, 2016 #2

    berkeman

    User Avatar

    Staff: Mentor

    Welcome to the PF.

    As long as the connection includes a pump... :smile:
     
  4. Feb 23, 2016 #3
    Yeah i didnt think there is any other solution except that.... Are there some kind of pumps that dont use electricity (or any other imputs), something that works soley on mechanics, and are those pumps efficient in comparison with electrical pumps?
     
  5. Feb 23, 2016 #4

    berkeman

    User Avatar

    Staff: Mentor

    What's the application?
     
  6. Feb 25, 2016 #5

    CWatters

    User Avatar
    Science Advisor
    Homework Helper

    What do you mean by "or any other inputs"?

    There are hand cranked pumps. Are they allowed?
     
  7. Feb 25, 2016 #6
    there is no application...I just want to find out how things work
     
  8. Feb 25, 2016 #7

    berkeman

    User Avatar

    Staff: Mentor

  9. Feb 25, 2016 #8
    I have another question that bothers me..... If we have 2 tanks, Tank 1 is lower and Tank 2 is higher and they are connected. If water is flowing in Tank1, will Tank 2 also be filled and if so, are the water heights in both Tanks equal?
     
  10. Feb 25, 2016 #9

    berkeman

    User Avatar

    Staff: Mentor

    If the water heights are not equal and the tanks are connected, there will be a water pressure difference that will drive water from the higher pressure (higher height) to the lower pressure, until the two heights are equal.
     
  11. Feb 25, 2016 #10
    I understand thank you....One more.... If we use Venturi pipe to connect two tanks, lets say that smaller end goes in Tank 1, and bigger end goes in Tank 2. Lets say that bigger end is twice the size of smaller end of the pipe. Does that affect water levels in Tanks.
     
  12. Feb 25, 2016 #11

    berkeman

    User Avatar

    Staff: Mentor

    The change in pressure due to the Venturi effect only occurs when the liquid or gas is flowing. So it will affect how quickly the two tank pressures equalize, but won't prevent them from equalizing eventually.

    https://en.wikipedia.org/wiki/Venturi_effect
     
  13. Feb 25, 2016 #12

    sophiecentaur

    User Avatar
    Science Advisor
    Gold Member

    Basically, no, not never ever. You cannot do work without an energy source. All the devices that appear to do that are based on some hidden source of energy (a trick) that is not obvious to the audience. If you define a pump as a device that raises the level of a fluid then all pumps need energy.
     
  14. Feb 25, 2016 #13
    I was reffering to something like this
    https://en.wikipedia.org/wiki/Hydraulic_ram
     
  15. Feb 26, 2016 #14

    sophiecentaur

    User Avatar
    Science Advisor
    Gold Member

    Yes - and a hydraulic ram uses the Power of the water flowing through it. You may regard that as 'free' energy but it's still an energy input. The lower of your two tanks would have to have another outlet, allowing water flow downhill, out of it, to power the Ram.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook