which ever one you go with...try to increase your base thickness to atleast 4 or 5MM to get the best performance out of it. I speak from experience and have wasted many beautiful peices of copper learning the hard way.
what i mean by base thickness is the depth from the bottom of your channel to the bottom of the stock.
i cant give you any advice on any of them because i dont even know which are the inlets and outlets on them, but i will say dont go with the last one. you will get a huge pressure drop in that one and have an extremely high delta T no matter what you do.And i would have to say that based on what i can see, IMHO, none of them will be a good performer.sorry to be so harsh but you wanted the truth right?each of them will have alot of hot spots where water wont even move too often. it would be better to mill a simple maze design or atleast try to keep your channels the same diameter all the way through, and cut down on the sharp right angled turns because they will eat your flow rate faster than you think unless you have really deep channels to begin with.
designing your own is a fun and time consuming project. dont expect to create the perfect block in your first try either. the main thing to remeber is to keep trying and take your time.copper is a very unforgiving material to work with. and be willing to accept some constructive critisicm because there are many skilled people in this forum who will be glad to help you out if you listen( or not)
and just a little tip for your milling frenzies......use solid carbide end mills. yeah, they cost more but i guarentee you wont use 1/10th of the total HSS or simular bits, and you really have to try to break one of those babies off!!
Is that solidworks youre using??great little proggie.......sure makes modeling alot simpler
