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hydrodynamicist
12-17-10, 03:44 PM
Hello All,

I am new to your site. We simulate flow around ships and submarines. Our most recent work shows a Los Angeles Class submarine cruising on the ocean surface. The link is provided here:

http://www.youtube.com/waveanimations

I hope that enjoy the numerical simulation.

Best regards, Doug.
Diopos
12-17-10, 04:19 PM
Doug,
very interesting, useful and beautiful!!!!
Thanks for sharing.

For the people who didn't understand the depth of what Doug posted here, I quote from his link:

A 688 submarine traveling on the surface of the ocean is shown. The simulation was performed on a Cray XE6 supercomputer using 6,144 processors. The simulation ran for 19,000 time steps and completed in 36 hours."


(I underlined the obviously interesting - I think- parts).
V.C. Sniper
12-17-10, 05:00 PM
OMG I am so amazed and wowed by this! Thank you so much for letting us know about this!

This looks so uber awesome!
Gerald
12-17-10, 06:22 PM
:salute:
Bill Nichols
12-17-10, 06:58 PM
Very, very cool!

:ahoy:
Takeda Shingen
12-17-10, 07:08 PM
Howdy. And that video is mighty cool. :up:
Sledgehammer427
12-17-10, 07:15 PM
if memory serves me right, Skip Tyler in the book Hunt For Red October used a Cray supercomputer to test the theory that the Red October was using the magneto hydrodynamic drive that made it practically silent. Is that the same thing as you guys are doing here?

It's mindboggling to wrap your head around what goes into things like this.
welcome aboard and thanks for sharing!
Sailor Steve
12-17-10, 10:54 PM
Very nice!

WELCOME ABOARD!:sunny:
ajrimmer42
12-18-10, 06:06 AM
That is stunning!
vienna
12-18-10, 01:49 PM
Quote:

A 688 submarine traveling on the surface of the ocean is shown. The simulation was performed on a Cray XE6 supercomputer using 6,144 processors. The simulation ran for 19,000 time steps and completed in 36 hours."


Will the XE6 run SH5 without CTD or slow FPS?
Diopos
12-18-10, 05:45 PM
Quote:

...

Will the XE6 run SH5 without CTD or slow FPS?

Nope, the XE6 does not have a permanent connection to UBI servers!

:D:D

.
Oberon
12-18-10, 07:54 PM
Fantastic animations and calculations there.

Looking through your gallery I see other hull projects. I like the look of model 5613, reminds me a lot of an old Dreadnought or Torpedo Ram. The Athena model is also very nice and has a nice bow cutting action which turns the vertical wave energy into horizontal. I do ponder how it would react with a curved stern like the average battleship or battlecruiser once had.

Do you model the effects of superstructure on wave breaking in later stages? :hmmm:
hydrodynamicist
12-19-10, 12:23 AM
Fantastic animations and calculations there.

Looking through your gallery I see other hull projects. I like the look of model 5613, reminds me a lot of an old Dreadnought or Torpedo Ram. The Athena model is also very nice and has a nice bow cutting action which turns the vertical wave energy into horizontal. I do ponder how it would react with a curved stern like the average battleship or battlecruiser once had.

Do you model the effects of superstructure on wave breaking in later stages? :hmmm:

If the superstructure affects the aspect of the design that interests us, then we will add it. It was not always possible to include such design details in the past because our code was not fast enough. Now it is. -Doug.
hydrodynamicist
12-19-10, 12:30 AM
if memory serves me right, Skip Tyler in the book Hunt For Red October used a Cray supercomputer to test the theory that the Red October was using the magneto hydrodynamic drive that made it practically silent. Is that the same thing as you guys are doing here?

Our goal for the 688 was just to show that we can model a complicated free-surface flow. Given that goal, we did not include many details of the boat, and we just focused on the flow around the hull. -Doug.
Sledgehammer427
12-19-10, 01:25 AM
Our goal for the 688 was just to show that we can model a complicated free-surface flow. Given that goal, we did not include many details of the boat, and we just focused on the flow around the hull. -Doug.

Thanks for the clarification. It looks like you guys got exactly what you were looking for. I'm interested in how the data will be used as well, but from the looks of it (the model 5613 looks like the hullform of a projected Zumwalt class destroyer) I doubt you will be able to tell us much.