Been thinking a lot on this, and drawing up some plans/schematics/rules-of-thumb/trigonometry.
Can be done using a square grid array.
Pick a drill bit size to do the dimples with. Let's choose 3/32" (~2.4mm)
Sides on elements of the grid should by 5/6 (exactly) of the drill bit size (or 5/64" for our 3/32" drill bit size)
This creates rough diamond shaped pins that are about 0.25 of the grid distance on a side (in this example around 5/256" or about 0.5mm on a side). These pins are going to be important as structural supports for the base-plate.
Plate thickness should be twice as thick as the drill bit size (3/16" in this case). Drill depth should be 1.5x of the drill bit size to the bottom of the drill holes.
This creates the dimples, the pins, and enough channel area between the pins for the water to flow out.
A dimpled area of 5/8" x 5/8" will be adequate for most any CPU. Need to create side outlet channels to enable middle in, dual-side outlet config.
Inlet jet plate will have jet holes to match the dimples. Jet holes should be 1/3 of the drill bit size in width (1/32")
For a 3/32" dill bit grid array over a 5/8" x 5/8" area this creates basically a 8 x 8 grid. Total jet orifice area is around 32mm^2 which is restrictive enough to create a very good jet velocity with something like an Eheim 1250 pump.
Ben, got any objections if I get my machinists to make up the above on a CNC mill?
|