myklrs

Actually I am a gold dredger, I am working on an underwater gold mining system that uses less horse power because it does not break the waters surface. It is very efficient as it traps gold particles on an incline rather than a gravity system with riffles. I have not seen a true 360 degree jet in all my years of mining and I think this is it. Most jet logs are set at a 45 degree angle or there about. This is a true 360 degree suction jet. Thank you for your imput, myklrs.

I know I probably did my calculations wrong, but does anyone have an opion on whether this idea would work before I start to build one? thanks myklr.

I have been thinking of your comment and have a few questions or thoughts. I read in an article (research on the Bernoulli Principle) that the restricted area should be 1/2 the size of the inlet diameter. For example: 10" inlet to a 5" restriction. OK, then it mentioned that the restriction should be short. It also mentioned that by inserting a tube in the restricted area acts like a pump by siphoning air pressure into the restriction area increases the fluid flow, 1 atm or 14.7 psi. at sea level. Questions: 1) How short should the restriction be, is there a rule of thumb or best ratio for the length of the restriction in relation to the inlet and outlet. 2) If you add more than one tube to the restriction area does that increase the flow characteristics. Example: two tubes at 180 degrees apart or 3 tubes at 120 degrees apart. 3) Would adding a venturi tube after the Bernoulli Principle section benefit the velocity of the fluid (water) moving through the Bernoulli section. 4) Is there a relation for the size of the tube size in the restriction area, how big or small or does it matter. Thanks for any comments, myklrs.

I should restate my question, it was not very clear. I am trying to produce a strong suction at the circle utilizing the Bernoulli principle in a pipe with in a pipe by reversing the normal water flow in the outer pipe there by producing a strong suction or vacuum for the 2" pipe at the circled area. The total length of pipes with in the pipes is 5 ft. Outer pipe is 6" ID, Bernoulli section pipe is 4" ID, suction pipe is 2" ID. High pressure trash pump: 433 gal/min, 4" intake on pump, 3" discharge on pump. Any thoughts would be appreciated on creating the strongest type of suction or vacuum. Thanks myklrs. Suction power.bmp

I was wondering while looking at the Bernoulli schematic if you can produce a strong suction or vacuum at the entry of the schematic? For example: using a 6 inch pvc pipe in the schematic and inserting a 2 inch pipe a couple inches inside of the six inch pipe at the entry area of the schematic. Water would be flowing on the outside of the 2 inch pipe but inside the 6 inch pipe. Would there be a suction or vacuum area so that water would flow through the 2 inch pipe. If so, could I manipulate the schematic (dimensions of the outside pipe through bell reducers or differing the different lengths or areas of the schematic to increase the suction or vacuum power or energy.