CFD modelling - skiff

[mightyshoulders]

All,

I am hunting for a detailed CAD model of a skiff/olympic dinghy/something interesting for work and a CFD demo.

If anyone has anything suitable and they are interested in seeing the results give me a shout.

Sorry it's a bit sodding serious for this forum but thought you lot might come up with something interesting!

Jon

 

[the_skiff_devil]

I can provide a model of dave lister's moth and some fastacraft foils if you want to CFD the world's fastest home-built moth

 

[Bill E Goat]

What format in decreasing order of quality Iges, Dwg, Dxf

 

[mightyshoulders]

What format in decreasing order of quality Iges, Dwg, Dxf

Not really fussed about format...iges, .stl, .3dm,

Whatever, providing the detail is still there.

Might be back for the moth depending on what else gets offered

 

[Danny Boy]

I can give you a nice trimmed up .IGES of my ship, plus dagger and rudder.

Or 2D/3D .dxfs / dwgs

 

[skiffboy]

What format in decreasing order of quality Iges, Dwg, Dxf

Would be interesting to see a comparison of the Woof, BMMII and L34.232 12' skiffs. With plenty known on actual performance of the Woof then there would be a good baseline for scaling the results into the real world.

 

[mightyshoulders]

Is there CAD knocking around for them?

What format in decreasing order of quality Iges, Dwg, Dxf

Would be interesting to see a comparison of the Woof, BMMII and L34.232 12' skiffs. With plenty known on actual performance of the Woof then there would be a good baseline for scaling the results into the real world.

 

[TP30]

Are you after just a hull, or the foils as well, or even with the rig included? I can offer this as a hull.

 

[mightyshoulders]

I was hopefully after the whole thing, rig, appendages and all. But I could probably piece things together if need be...

Any other bits and pieces from anyone?

Are you after just a hull, or the foils as well, or even with the rig included? I can offer this as a hull.

 

[skiffboy]

Is there CAD knocking around for them?

What format in decreasing order of quality Iges, Dwg, Dxf

Would be interesting to see a comparison of the Woof, BMMII and L34.232 12' skiffs. With plenty known on actual performance of the Woof then there would be a good baseline for scaling the results into the real world.

Yep 3D models of each hull. no idea about foils, rigs etc. Talk to the Goat and he can get you started.

 

[mightyshoulders]

May I ask which Goat?

Is there CAD knocking around for them?

What format in decreasing order of quality Iges, Dwg, Dxf

Would be interesting to see a comparison of the Woof, BMMII and L34.232 12' skiffs. With plenty known on actual performance of the Woof then there would be a good baseline for scaling the results into the real world.

Yep 3D models of each hull. no idea about foils, rigs etc. Talk to the Goat and he can get you started.

 

[Speng]

All,
I am hunting for a detailed CAD model of a skiff/olympic dinghy/something interesting for work and a CFD demo.

If anyone has anything suitable and they are interested in seeing the results give me a shout.

Sorry it's a bit sodding serious for this forum but thought you lot might come up with something interesting!

Jon

What CFD program?

 

[Pete M]

CFD=colors for directors

getting a model to mesh is one thing - accurately matching the flow of an existing planing hull is quite another

much less predicting the flow of a new hull

 

[mightyshoulders]

For sure...we use openFoam.

We have a rnge of tank validation cases but they are relatively basic in detail, and I want something for marketting with a level of detail above standard tank testing.

Our bread and butter is the performance motorsport industry...so a little different but accuracy is essential so we are used to hunting for accuracy.

If you never try you will never get there.

10 years ago the automotive industry said the same...but now we can get stuff to track without ever seeing a wind tunnel and have results to show it.

One step at a time

CFD=colors for directors
getting a model to mesh is one thing - accurately matching the flow of an existing planing hull is quite another

much less predicting the flow of a new hull

 

[Pete M]

doing incremental changes to an existing known shape is one thing

doing a whole new shape is another thing altogether

and a planing hull with appendages in the water air interface - with a variable waterline, will be close to imposable

crap – we pay 10,000 a year for a license and have several aero guys using it - and they still fucked up the drag numbers on a simple rocket, to the tune of 15%, and this after three weeks in a supersonic wind tunnel two years ago

 

[mightyshoulders]

it's not about how much you pay...hence the shift in industry towards openSource.

And I'm not about to say we can model a planing hull accurately, thats why I'm after CAD...to model, validate, improve. We can do a decent job of the aero though...thats our expertise.

doing incremental changes to an existing known shape is one thing
doing a whole new shape is another thing altogether

and a planing hull with appendages in the water air interface - with a variable waterline, will be close to imposable

crap – we pay 10,000 a year for a license and have several aero guys using it - and they still fucked up the drag numbers on a simple rocket, to the tune of 15%, and this after three weeks in a supersonic wind tunnel two years ago

 

[Andrew P]

All,
I am hunting for a detailed CAD model of a skiff/olympic dinghy/something interesting for work and a CFD demo.

If anyone has anything suitable and they are interested in seeing the results give me a shout.

Sorry it's a bit sodding serious for this forum but thought you lot might come up with something interesting!

Jon

i have a model of a B3 with foils, rig, sails and crash test dummies on wire if you wish. Accuracy of the whole thing may be suspect for meshing purposes but its there.

Andrew

 

[mightyshoulders]

Sounds great, wil message you off board.

All,
I am hunting for a detailed CAD model of a skiff/olympic dinghy/something interesting for work and a CFD demo.

If anyone has anything suitable and they are interested in seeing the results give me a shout.

Sorry it's a bit sodding serious for this forum but thought you lot might come up with something interesting!

Jon

i have a model of a B3 with foils, rig, sails and crash test dummies on wire if you wish. Accuracy of the whole thing may be suspect for meshing purposes but its there.

Andrew

 

[TalonF4U]

Danny Boy, that's a goergeous looking toy, but how in pete's name do you tack?