- #1
Alfreds9
- 28
- 1
1. Homework Statement
Do you think it's possible for an object to be relatively motionless if floating on rippled water surface?
Could this be achieved by have it float inside one (or several nested) water/oil-containing containers?
2. Homework Equations
ES = - n2(k-m)2 Lucassen's dispersion for capillary waves at a liquid-air interface3. The Attempt at a Solution
From my (limited) understanding, spilling oil (ugh, poor ecosystems) on water has been a very old trick to dissipate wave energy caused by surface elasticity through the Gibbs-Marangoni effect, however even after scrolling Lighthill's "Waves in Fluids" and reading "The calming effect of oil on water" (Behroozi et al. 2007) I don't yet understand if the tiny amounts measured by Rayleigh (0.81 mg oil spreading on 555 cm^2, or 18mg/square meter) are enough to produce a noticeable dampening effect (compared to a buoy-bound larger amount eventually being thicker) on waves of lower frequencies but larger amplitude (such as those found at sea even on relatively quiet days).
Unfortunately that study doesn't value the attenuation coefficient of mineral oil (which seemed to me like a inert-enough substitute for successive confined-pond experimentation), so if anybody knows which dampening I'd get (or knows of studies on this), I'd appreciate it.
Thank you
Allison
Do you think it's possible for an object to be relatively motionless if floating on rippled water surface?
Could this be achieved by have it float inside one (or several nested) water/oil-containing containers?
2. Homework Equations
ES = - n2(k-m)2 Lucassen's dispersion for capillary waves at a liquid-air interface3. The Attempt at a Solution
From my (limited) understanding, spilling oil (ugh, poor ecosystems) on water has been a very old trick to dissipate wave energy caused by surface elasticity through the Gibbs-Marangoni effect, however even after scrolling Lighthill's "Waves in Fluids" and reading "The calming effect of oil on water" (Behroozi et al. 2007) I don't yet understand if the tiny amounts measured by Rayleigh (0.81 mg oil spreading on 555 cm^2, or 18mg/square meter) are enough to produce a noticeable dampening effect (compared to a buoy-bound larger amount eventually being thicker) on waves of lower frequencies but larger amplitude (such as those found at sea even on relatively quiet days).
Unfortunately that study doesn't value the attenuation coefficient of mineral oil (which seemed to me like a inert-enough substitute for successive confined-pond experimentation), so if anybody knows which dampening I'd get (or knows of studies on this), I'd appreciate it.
Thank you
Allison
