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IronFire · 04-28-2002, 03:25 PM

The block had under gone many changes through the modelling process but this was the final design I settled on after much work.

Here are some Pictures of the bottom layer of the block:

The water comes into the centre of the block, which is directly over the CPU die. The block is at its thinnest here with the copper thickness over the die being only 2.5mm. Connected to this is to smaller channels that are 10mm deep from the top of the layer which spiral outwards in a smooth curve to help keep water flow levels high. This channel is 3mm from the base and moves out round the block in the bottom of the main channel. The water in the this channel will heat up quicker than at the side of the channel due to it having a base 1mm thinner and so will create convection currents. This will make the water move up in the block and bring cooler water from the sides down into this lower channel; this mixes the water in the main channel. The channel depth is 1mm and width 4mm.

The centre chamber in the block has a diameter of 20mm and this is filled with the fresh cold water from the inlet of the block.

Once the water has been in the main chamber it moves out through the arms spiralling into the main chamber. These main channels have diameter 6mm and depth of 9mm and together make a combined water channel out of the block of over 12mm width. Along the side of these main channels there are turbulence inducing "dimples" which are on both sides of the channels. These have a depth of 0.5mm and have chamfered corners of 0.25mm for smooth water in and out flow, they are 9mm in length not penetrating to the depth of the lower channel. These help create turbulence in the water flow as when the water hits them it goes into the dimple then directed out at angle into the main flow of water. These devices also increase the surface area of the inside of the block, which the water has contact to as well as increasing the volume of water that the block can hold.

Due to the "dimples" the need for pure 90 degree bends to induce water turbulence has been reduced. They have been partly eliminated with the bends in the blocks water channels being very smooth and wide with heavily chamfered ends. This reduces the effects of flow constriction caused by corners. The corners themselves also contain dimples.

The copper of the channels has not been machined to a smooth finish and has been left with a slightly rough finish again to help create more water turbulence and to increase the surface are of the copper in contact with the water

When the water comes to the end of the channels the lower channel stops forcing the water up into the main channel only. Above this the layer has a hole in its base at the start of its channel. The water is then forced up to the next level of the water block by the water below it.

04-28-2002, 03:25 PM	#2
IronFire Cooling Neophyte Join Date: Apr 2002 Location: UK Posts: 11	The block had under gone many changes through the modelling process but this was the final design I settled on after much work. Here are some Pictures of the bottom layer of the block: The water comes into the centre of the block, which is directly over the CPU die. The block is at its thinnest here with the copper thickness over the die being only 2.5mm. Connected to this is to smaller channels that are 10mm deep from the top of the layer which spiral outwards in a smooth curve to help keep water flow levels high. This channel is 3mm from the base and moves out round the block in the bottom of the main channel. The water in the this channel will heat up quicker than at the side of the channel due to it having a base 1mm thinner and so will create convection currents. This will make the water move up in the block and bring cooler water from the sides down into this lower channel; this mixes the water in the main channel. The channel depth is 1mm and width 4mm. The centre chamber in the block has a diameter of 20mm and this is filled with the fresh cold water from the inlet of the block. Once the water has been in the main chamber it moves out through the arms spiralling into the main chamber. These main channels have diameter 6mm and depth of 9mm and together make a combined water channel out of the block of over 12mm width. Along the side of these main channels there are turbulence inducing "dimples" which are on both sides of the channels. These have a depth of 0.5mm and have chamfered corners of 0.25mm for smooth water in and out flow, they are 9mm in length not penetrating to the depth of the lower channel. These help create turbulence in the water flow as when the water hits them it goes into the dimple then directed out at angle into the main flow of water. These devices also increase the surface area of the inside of the block, which the water has contact to as well as increasing the volume of water that the block can hold. Due to the "dimples" the need for pure 90 degree bends to induce water turbulence has been reduced. They have been partly eliminated with the bends in the blocks water channels being very smooth and wide with heavily chamfered ends. This reduces the effects of flow constriction caused by corners. The corners themselves also contain dimples. The copper of the channels has not been machined to a smooth finish and has been left with a slightly rough finish again to help create more water turbulence and to increase the surface are of the copper in contact with the water When the water comes to the end of the channels the lower channel stops forcing the water up into the main channel only. Above this the layer has a hole in its base at the start of its channel. The water is then forced up to the next level of the water block by the water below it.