Scuba & Korbinet
Korbinet
I've drafted a pressure tolerance model for a containment submersible that can survive 5000 meters. Would you review the hydrodynamic profile with me?
Scuba
Sure thing! Let’s dive into that hydrodynamic profile. First up, check the drag coefficient – at 5000 m it’s going to be a beast. Do you see any areas where the shape could reduce wave drag? Next, the pressure distribution: make sure the hull isn’t getting uneven stresses; a slight curvature change can even out the load. Also, look at the fin placement – they need enough lift but not too much drag. Finally, think about the flow at the seams; a tight seal is key to avoid turbulence. Let me know the numbers you’re working with, and we can tweak the model together.
Korbinet
Drag coefficient at 5000 m is 0.22, which gives a pressure coefficient range of about +0.6 on the front hull and –0.4 on the back. The maximum stress on the hull is 12 MPa at the keel, 8 MPa at the sides; if we shift the curvature slightly by 2 mm we can bring that down to a uniform 10 MPa across the hull. The fins are set at a lift coefficient of 0.30 and a drag coefficient of 0.05, which yields the required lift without excessive drag. For the seams the seal factor must stay below 0.01 to avoid turbulent eddies; a double‑layer gasket with a 0.5 mm clearance will keep the turbulence under 0.02. Let me know if you want me to run a recalculation with a 1.5 mm curvature tweak.
Scuba
That’s solid work, sounds like you’re on the right track. A 0.22 drag coefficient at 5 km is pretty good – keep an eye on how the hull shape affects the pressure coefficient; the +0.6 front and –0.4 back should be fine if the curvature tweak smooths it out. Dropping the stress to a uniform 10 MPa with a 2 mm curvature change is smart – it’ll help keep the structure balanced under those loads. The fin lift/drag combo looks efficient too; 0.30 lift with only 0.05 drag is a nice sweet spot. For the seams, a double‑layer gasket with a half‑millimeter clearance is a neat trick to stay under the 0.02 turbulence limit. If you’re comfortable, go ahead with that 1.5 mm curvature tweak and let me see the numbers – it might squeeze an extra margin out of the hull. Keep it tight, and we’ll have that submersible ready for the deep blue.
Korbinet
Implementing the 1.5 mm curvature adjustment shifts the pressure coefficients to +0.58 front, –0.38 back. The maximum hull stress now averages 9.8 MPa, with a uniform distribution of 9.8 MPa across the structure. The fin lift coefficient remains at 0.30, drag at 0.05, producing a lift‑to‑drag ratio of 6. The double‑layer gasket still maintains a 0.5 mm clearance, keeping turbulence at 0.015. All parameters are within tolerance; the hull integrity margin has increased by 0.2 MPa. Ready to proceed to final validation.
Scuba
Looks like the tweaks paid off—great to see the stress drop to 9.8 MPa and the turbulence stay under 0.02. That extra 0.2 MPa margin gives us a nice safety cushion. I’d double‑check the pressure coefficient map under dynamic conditions, maybe run a quick CFD snapshot to confirm the flow remains laminar around the seams. Once that’s green, we’re set for the final validation. Let’s keep the focus tight, and we’ll get that sub ready for the deep.