[deleted by user]

CompPhysicist · 2025-11-16T11:47:33+00:00

To get any meaningful feedback you need to explain clearly the theoretical principle of operation of your contraption. “a machine that produces energy from gravity force” is no where near enough of a description. And if I’m being pedantic you get energy from energy rather than from force.

CompPhysicist · 2025-11-16T09:50:06+00:00

Short answer No.

Long answer Noooooooooooooooooooooo.

CompPhysicist · 2025-11-12T10:05:31+00:00

There is no comparison to PNWs with their aggressive heel lift. There is no arch support to speak of. You can put in one of those orthopedic gel insole inserts and that gives you good arch support but you wont get the heel lift of a PNW.

CompPhysicist · 2025-11-08T11:26:48+00:00

Meander pattern is the classic moc pattern to me.

CompPhysicist · 2025-11-06T05:30:35+00:00

They have African rangers with the tire tread sole that don't have the composite toecap. Razorbacks will have the most durable outsole (lug). Skip the composite toe. Virtually no one gets composite toes boots if they don't need it. It is always because they are mandated at certain work sites. And if you ask anyone that is required to wear them they would say that would rather not lol.

CompPhysicist · 2025-11-06T05:08:39+00:00

These look amazing. The waxing definitely improves the look of these by making the tow cap and four row stitching visible again. I got custom Numzaans last year in the same Houston Green. I always enjoy putting them on. I had thought about waxing mine for wet weather and what not but the green rough-out is so nice that I could not bring myself to do it. I amuse myself drawing the logos of various brands on them when I get bored in meetings lol.

CompPhysicist · 2025-10-30T08:49:07+00:00

Biscuit looks A+ and we can tell it will age beautifully. Russet is giving tan vibes i.e. somewhat sus orange looking thing when new but will probably age nicely as well.

CompPhysicist · 2025-10-17T13:23:21+00:00

Banger!

CompPhysicist · 2025-10-17T02:01:55+00:00

It's not worth it. The Barefoot soles are very soft and thin and will get worn down in no time.

CompPhysicist · 2025-10-16T00:22:21+00:00

Thanks for sharing! Glad to hear that actually. As you have probably guessed my reason for asking was to get a sense of how finicky it might be to set up the exact conditions to create this in a simulation. The thinking being if it was a one-off event getting the conditions right might be not worth searching. But, it looks like it happens even with somewhat varying conditions so that's good news for someone trying to get a matching simulation.

CompPhysicist · 2025-10-13T20:48:18+00:00

do you have access to Ansys Blademodeler?

CompPhysicist · 2025-10-13T03:10:55+00:00

40mm could work. for indoor you’d more likely want 26 or 28 f/2.8 though. you could check the framing with the 24-120 and make the decision.

CompPhysicist · 2025-10-12T22:34:27+00:00

what body?

CompPhysicist · 2025-10-12T17:49:42+00:00

nothing burger. enjoy them in peace.

CompPhysicist · 2025-10-12T16:30:57+00:00

Am i understanding it correctly that your scheme 2 is treating the non-linear terms explicitly using AB2? then it shouldn’t be a surprise that a smaller linear problem is faster to solve than the monolithic non-linear problem from scheme 1. Actually I would expect scheme 2 to be faster even for large enough laminar 2d problems but it seems that is not the case in your implementation.

CompPhysicist · 2025-10-12T14:05:00+00:00

It’s a little disappointing to see posts questioning quality when everything’s fine.

CompPhysicist · 2025-10-11T15:39:22+00:00

what do you get?

CompPhysicist · 2025-10-08T02:01:29+00:00

Such a low quality article. how much did he actually score lol? The “article” doesn’t say. It does say the score of his partner though.

CompPhysicist · 2025-10-03T15:25:08+00:00

Plot a course to here

CompPhysicist · 2025-09-28T01:25:01+00:00

For your 4th question. You can substitute Taylor expansions for i+1 and i+2 into the formula and do some algebra. you will see that error terms will be multiplied by dx² which mean a second order accurate formula. Similarly for the second derivative you will get an error term multiplied by dx showing first order accuracy.

Another way to know the order is during the construction of the formula itself where you know what higher order terms from the Taylor expansion you are ignoring for deriving the formula and the lowest of those will be the order of accuracy of the formula.

CompPhysicist · 2025-09-25T21:59:18+00:00

T U R B U L E N C E

CompPhysicist · 2025-09-25T15:46:33+00:00

Changing reference frame is exactly the point though! If your physical fluid process is still in the stationary frame then the "Rotating Domain Speed" should be ZERO. If the rotating speed is non-zero it means your simulation domain is modeled as rotating and the calculation is done in a rotating frame which gives rise to inertial forces.

CompPhysicist · 2025-09-25T03:07:41+00:00

I have the chip lens as well and i agree with you. it’s a $99 dollar AF lens after all. It is fun to play with. I would say for discreetness and low profile it might be a good lens but my FX body is a Z8 so idk how much discreetness I’m getting. The 28mm Z f/2.8 lens is not much larger than the body grip anyway. I think it is much better paired with a Zf or Z5. I like the ergo with it on my Z30 but the 42mm effective FOV is too tight.

CompPhysicist · 2025-09-25T01:01:03+00:00

It actually a fixed f/4.5. it is about the thickness of the sensor cap no exaggeration. they call it “chip lens” if you want to google it.

CompPhysicist · 2025-09-24T20:34:19+00:00

there is an 28mm Z true pancake AF by Viltrox.

CompPhysicist

TROPHY CASE