- Joined
- Jun 8, 2002
- Location
- Melbourne, Australia
Thought I'd make a thread here on its own. Some of you are probably aware that I've been working on a new waterblock which I've nick-named the "Cascade". The design has already gone through a few months of research, and about a month's worth of tweaking actual materials, and it's getting pretty close to the final phase.
The block's principles are based on ideas drawn from myself, BigBen2K, Volenti, and jaydee116 (aka CustomCooledPC), and this is my vision on how the ideas can be brought to a physical reality.
The block works by water entering the middle barb into a manifold cavity that distributes the water flow out to the jet tube entrances. The jet tubes accelerate the water to around 4x the entrance velocity. Water travels down each jet tubes and is pushed directly down the middle of a "cup" (one for each tube) drilled into the copper base-plate. The jets impinge on the base-plate, creating a highly efficienct stagnation region of thermal transfer.
Now with jet impingement the further you get away from the middle the jet, the less the cooling effect. Other people have tried jet arrays, but the flow coming off from surrounding jets interferes with the efficiency of each jet, and while free jet arrays are more efficient than a single jet, they can be improved upon.
Enter the cup. The cups are very closely spaced together. They are wide enough to allow each jet's primary stagnation region to form. The cups are also jet wide enough that the water flowing off the main impingement jet strikes the cup walls at close to the same velocity as the jet stream itself. This creates a secondary impingement effect right at the base of the cup walls. This effect is occurring right where we want it, and it soaks up the heat that would otherwise attempt to go up the copper walls between the cups.
The jet tubes are submersed into each cup slightly. This shields the jet streams from the out-flow of surrounding jets, and helps to guide the water out of the cup without interfering too much with the jet stream coming down.
The optimal width of the cups is directly linked to the width of the jets, and the height of the jets above the base-plate is also very important, as is the thickness of the base-plate, and the proximity of each cup to each other.
The pictures below are of the Rev 2 version of the Cascade design, and you may see some small machining irregularities which will be corrected by refining the machining process.
The design packs 52 jet tubes into a very small area. I've included a USA "dime" and an Australian 5c piece in the pictures for an idea of scale.
All up I'm very proud of the design and am very pleased to see it come together as a physical reality.
The block's principles are based on ideas drawn from myself, BigBen2K, Volenti, and jaydee116 (aka CustomCooledPC), and this is my vision on how the ideas can be brought to a physical reality.
The block works by water entering the middle barb into a manifold cavity that distributes the water flow out to the jet tube entrances. The jet tubes accelerate the water to around 4x the entrance velocity. Water travels down each jet tubes and is pushed directly down the middle of a "cup" (one for each tube) drilled into the copper base-plate. The jets impinge on the base-plate, creating a highly efficienct stagnation region of thermal transfer.
Now with jet impingement the further you get away from the middle the jet, the less the cooling effect. Other people have tried jet arrays, but the flow coming off from surrounding jets interferes with the efficiency of each jet, and while free jet arrays are more efficient than a single jet, they can be improved upon.
Enter the cup. The cups are very closely spaced together. They are wide enough to allow each jet's primary stagnation region to form. The cups are also jet wide enough that the water flowing off the main impingement jet strikes the cup walls at close to the same velocity as the jet stream itself. This creates a secondary impingement effect right at the base of the cup walls. This effect is occurring right where we want it, and it soaks up the heat that would otherwise attempt to go up the copper walls between the cups.
The jet tubes are submersed into each cup slightly. This shields the jet streams from the out-flow of surrounding jets, and helps to guide the water out of the cup without interfering too much with the jet stream coming down.
The optimal width of the cups is directly linked to the width of the jets, and the height of the jets above the base-plate is also very important, as is the thickness of the base-plate, and the proximity of each cup to each other.
The pictures below are of the Rev 2 version of the Cascade design, and you may see some small machining irregularities which will be corrected by refining the machining process.
The design packs 52 jet tubes into a very small area. I've included a USA "dime" and an Australian 5c piece in the pictures for an idea of scale.
All up I'm very proud of the design and am very pleased to see it come together as a physical reality.
. And was it much harder to get 52 instead of 30 or so u had on the last one? lol...And ill bet for the next rev ur gonna shoot for 70 rite 
