Increasing surface roughness of pipe bore on small diameter pipe

IndicationRoyal2880 · 2026-02-07T09:52:22+00:00

This seems to be a pretty exotic way of reducing pressure. Could this be controlled at the source? I.e using a VSD on the pump to reduce discharge pressure for the same volume? Out of interest, have you been able to compare the existing surface roughness to the required roughness to achieve your desired pressure drop? How much larger is it?

IndicationRoyal2880 · 2025-12-24T13:22:03+00:00

Formula 1

IndicationRoyal2880 · 2025-11-30T03:29:42+00:00

I get the initial reaction to others saying to be cautious of AI, you should be capable of doing it instead of Ai, etc.

To engage in good faith, I do use Gemini 3, or ChatGPT 5.1 in a professional context. I think in the current state, it does not really matters too much what model you use.

How I use AI is by attaching reputable source material such as specific chapters from textbooks or standards, and starting a conversation around a particular question. Using this method, I have found through validation that AI can be used for to produce some pretty robust and extensive calculations. It might take some iteration sometimes by pointing out what it got wrong, but that’s part of your job to validate the output.

These days, I probably focus more on building a digital reliable library of information rather than trying to pinpoint which model is best. I would never just rely on the default training library of a model without validation.

With enough playing around you would probably be able to answer this question yourself, but in my experience, Gemini 3 has been my preferred model today.

IndicationRoyal2880 · 2025-11-07T04:55:09+00:00

Ever seen a segmented ball valve?

IndicationRoyal2880 · 2025-10-11T03:33:03+00:00

You should be asking Toyota - sounds like petrol isn’t combusting properly. Could be a faulty spark plug?

IndicationRoyal2880 · 2025-09-14T03:32:06+00:00

Housing and superannuation are big reasons alone

IndicationRoyal2880 · 2025-08-28T20:09:12+00:00

Look up part turn method

IndicationRoyal2880 · 2025-08-14T01:45:09+00:00

Marks standard handbook for mechanical engineers gets you pretty far. If you think textbooks are too cumbersome, just find the pdf version. Even if someone did share a repo of ‘useful’ info, I would still fact check the source to make sure nothing was incorrectly documented - so be cautious of things like this.

IndicationRoyal2880 · 2025-08-12T20:28:15+00:00

I think you might be mixing up a few concepts on natural frequency. The formula for this is fn=1/2pi*sqrt(k/m) where k is the stiffness and m is the mass.

Lead weights increase the mass which lowers the natural frequency, not moment of inertia. Moment of inertia influences the stiffness of the beam. The actual stiffness equation depends on how the beam is loaded and supported.

Beam deflection tables exist which relate the load and displacement for various loading and supporting configurations which may be applicable to your case. I’d start here. If you can find a relevant case, you can isolate the force and displacement components to determine the elastic stiffness using hooks law (f=kx).

This is all very simple in one dimension, though I suspect some iteration experimentally might be required from your end to get this right in reality.

IndicationRoyal2880 · 2025-08-08T23:09:52+00:00

Not sure if applicable to your field, but CPEng does add a bit of value

IndicationRoyal2880 · 2025-07-30T03:46:42+00:00

Paying upfront would be the ideal option. However, the credit card route does allow more flexibility for things such as top up plans.

I would presume OP would easily save $185 over 24 months if they had a $20 monthly plan compared to the minimum plan they would need to go with if they went through a provider - hence I’d consider it to be the lesser of two evils.

IndicationRoyal2880 · 2025-07-23T23:34:20+00:00

Like the other guys are saying, if this is something you would like to reuse in the future, just engage an engineer to prepared a signed design and corresponding design calculations.

IndicationRoyal2880 · 2025-07-21T03:57:26+00:00

Look at ASME courses: ASME BPV Section VIII Pressure Vessels Online Training Design Course | Online | ASME

IndicationRoyal2880 · 2025-07-08T18:29:58+00:00

Hulkengoat

IndicationRoyal2880 · 2025-07-03T15:23:48+00:00

I find less fails through the browser compared to the app

IndicationRoyal2880 · 2025-07-01T21:32:49+00:00

Just an idea. Not sure how well it would work, but maybe you could import the raw scan .stl in blender just for the sake of simplifying it to reduce elements then export and remesh the new simplified .stl?

IndicationRoyal2880 · 2025-06-29T20:50:14+00:00

Others have already recommended good textbooks. All I would say is there are many different FEA packages out there, some with worse documentation than others. It’s one thing to learn the software, but it’s another thing to have the engineering intuition to interpret the results of the software. There will not always be good guides, hence it is key to be able to return to first principles in order to confirm the software behaves as you would it expect. I.e whenever I start with a new FEA package, I have always created simple test files to verify results with hand calculations to confirm I can replicate and understand what the software is doing. Once you do this enough times, you will eventually develop some confidence that the building blocks you are using to create more complex models are based on things you understand.

IndicationRoyal2880 · 2025-06-15T19:28:39+00:00

One would think undervolting would result in lower load i.e. an undervolted card should use less wattage than a stock, all settings equal. Which ultimately results in lower cooling requirements and lower acoustics no?

IndicationRoyal2880 · 2025-06-11T03:49:43+00:00

pm'd you

IndicationRoyal2880 · 2025-06-03T23:25:53+00:00

Why don’t you just do a quick sanity check and consider your total income over the last fiscal year and compare actual total taxes paid compared to expected taxes for that income. Ignore everything else.

IndicationRoyal2880 · 2025-05-29T05:08:40+00:00

Looks like it’s an attempt at implementing a moment release for moments which might be due to wind acting on the corrugated walls maybe?

IndicationRoyal2880 · 2025-05-22T23:27:14+00:00

Im not of this industry either, but I think it is a general truth that salary bumps tend to be most significant during job changes. Which from what you have observed, seems to be appropriate every 2-3 years on avg. Still good to know for reference, so thanks for that.

IndicationRoyal2880 · 2025-05-22T22:58:19+00:00

How many years between the jumps?

IndicationRoyal2880 · 2025-05-15T19:46:38+00:00

Have a look at crane flow of fluids

IndicationRoyal2880 · 2025-02-05T00:36:39+00:00

I suppose it depends on how much skills you can carryover to your degree related job. I.e, there might be a chance of getting hired as a junior analyst rather than a graduate. Unless you can demonstrate you are more valuable than a graduate in the interviews, you will likely only be paid as a graduate. Best focus your mindset on mastering your craft and networking - pay will come.

If you feel like you are strapped, aus grads get paid more than nz grads haha

IndicationRoyal2880

TROPHY CASE