fabrice DAVID Verified User

  • Male
  • from Paris (FRANCE)
  • Member since Mar 31st 2015
  • Last Activity:
Posts
139
Likes Received
117
Points
857
Profile Hits
1,310
  • fabrice DAVID

    Post
    Don’t be afraid of the toxicity of mercury during experiments. You have probably more mercury in your mouth than on your benchtop. (The dental amalgam are an alloy of 50% silver and 50% mercury)
    During all you life, it release mercury vapour in your…
  • fabrice DAVID

    Like (Post)
    Well, at least it blows the moss off the roof-tiles.
  • fabrice DAVID

    Replied to the thread Merry Christmas.
    Post
    Merry Christmas to all the LENR friends, and live long and prosper!
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    « Cydonia » wrote :

    « Please Fabrice David, stop dreaming behind works/ideas that are not yours but those of Jean Pierre Petit. You should start for Lenr applications to follow rather Willard Custer way of life..creativity and modesty. »

    To « Cydonia…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    But conventional thrusters have a relatively low ejection velocity, so that the specific impulse of chemical rockets is quite low.

    And since ionic liquids are combustible, one could imagine producing microplasmoids (by cavitation in a magnetic field in…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    In this drawings, I just figure the ejection nozzle, but the air inlet is symmetrical, of course.
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    We need just a "funnel" with a frustum-shaped superconducting coil at the air inlet, and a symmetrical coil around the nozzle.

    The field gradient increases in the coil surrounding the air inlet, and the plasmoids will be compressed (adiabatically,…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    This eliminates the need for refractory and very solid electrodes (and very heavy, which is annoying in an aircraft), it also eliminates the need for cesium injection and the entire energy transfer system from the prow to the stern (MHD Bypass)

    But the…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    (continuation of the previous episode on space planes)

    And this is where the plasmoids are interesting: they are likely to be more compressible than the fluid that supports them. If we inject a metafluid of ionic liquid containing plasmoids into the…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    Thanks, Alan.

    To Seiber :

    I am not a theoretician, but of course I don’t think that doing Science is the act of doing random experiments in the dark.

    Of course, I have some idea about the theory, but I am ready to accept any theory who works from…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    And that brings me back to the two possible industrial applications of these hypothetical small plasmoids that we could produce with cavitation bubbles in a magnetic field:

    You know that I am interested in the problem of space and hypersonic aircraft.
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    To longview, who says: «:It is a supercritical fluid, a supercritical plasma, which is essentially a supercritical fluid. "

    We know what a supercritical fluid is, but I do not know what a "supercritical plasma" is.

    For the record, a supercritical…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    I also suggest improving the system by removing water vapor in the bubbles. Indeed, when the bubble collapses, (1) there is steam inside, and when the bubble collapses, there comes a moment when the steam becomes supercritical, (2) and when the density…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    optical cavity between the poles of the magnet.
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    Unlike "Zephir", I do not think this research is totally useless.

    I will give you two examples:

    If we manage to generate small stable plasmoids in a deuterated liquid by cavitation under a magnetic field we obtain a liquid that contains some kind of…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    ??
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    The idea was that this ring of current would oppose the collapse of the bubble, and that it would be possible to turn each cavitation bubble into a stable little plasmoid: a ring of current surrounded by its field magnetic.

    I thought that the emission…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    Useless...

    Incredulous you are!

    The idea is that the wall of a collapsing bubble moves at several kilometers per second in a magnetic field. As the fluid is tap water (a conductive liquid), I thought that a huge electric current would form a ring in…
  • fabrice DAVID

    Replied to the thread Cavitation Energy Systems.
    Post
    Cavitation is an extremely useful phenomenon for producing high concentrations of energy. (High temperatures and high pressures)

    We constructed this electromagnet to study the behavior of cavitation bubbles in the presence of a magnetic field.

    I…