3 ms·

> Urine is not a magical substance No, but people do have urine (specific gravity, consistency, etc), physical (flow rate differences, penile dimensional diffe

> Urine is not a magical substance No, but people do have urine (specific gravity, consistency, etc), physical (flow rate differences, penile dimensional differences, urinary meatus differences, etc), and behavioral differences (unkempt urinary meatus, different holding patterns, shaking, shy bladder, etc) which would affect those ideal scenarios.

boxed 2y ago
No, it wouldn't. This is just angles. Angles don't change. Gravity is stable and points roughly to the center of the planet. Viscosity changes won't change the angle of anything. That's the entire point.
- deleted 2y ago
  [deleted]
- ZYbCRq22HbJ2y7 2y ago
  From the supplementary materials: > Importantly, the dynamic viscosity µ and surface tension γ do not change across our experiments, nor in the context of human urination. From the paper: > Splash generated from a jet or droplet train impinging on a flat surface is a complex phenomenon depending on many factors, including the impact speed (U), impinging angle (θ), dynamic viscosity (μ), density (ρ), diameter of the jet or droplet (D), surface tension (γ) of the liquid, ambient pressure (P), as well as the wettability, contact angle, and roughness of the surface. ... In the context of urination, most of these factors cannot be changed. However, the impinging angle can be controlled to reduce or eliminate splash.
  - boxed 2y ago
    I think you misread that. That all says the general case might be more complex, but this specific subset of the problem isn't.
    - ZYbCRq22HbJ2y7 2y ago
      I didn't misread anything. I was replying to your claim with statements, from the paper itself, that invalidate your statement. The study used an experimental design that ignores those variables, because, they claim, they do not apply to human urination, without citing any resources.

3 ms·

> Urine is not a magical substance No, but people do have urine (specific gravity, consistency, etc), physical (flow rate differences, penile dimensional diffe

by ZYbCRq22HbJ2y7 2y ago

boxed 2y ago
No, it wouldn't. This is just angles. Angles don't change. Gravity is stable and points roughly to the center of the planet. Viscosity changes won't change the angle of anything. That's the entire point.
- deleted 2y ago
  [deleted]
- ZYbCRq22HbJ2y7 2y ago
  From the supplementary materials: > Importantly, the dynamic viscosity µ and surface tension γ do not change across our experiments, nor in the context of human urination. From the paper: > Splash generated from a jet or droplet train impinging on a flat surface is a complex phenomenon depending on many factors, including the impact speed (U), impinging angle (θ), dynamic viscosity (μ), density (ρ), diameter of the jet or droplet (D), surface tension (γ) of the liquid, ambient pressure (P), as well as the wettability, contact angle, and roughness of the surface. ... In the context of urination, most of these factors cannot be changed. However, the impinging angle can be controlled to reduce or eliminate splash.
  - boxed 2y ago
    I think you misread that. That all says the general case might be more complex, but this specific subset of the problem isn't.
    - ZYbCRq22HbJ2y7 2y ago
      I didn't misread anything. I was replying to your claim with statements, from the paper itself, that invalidate your statement. The study used an experimental design that ignores those variables, because, they claim, they do not apply to human urination, without citing any resources.