asteroza + dynamics   48

Observation of surface wave patterns modified by sub-surface shear currents | Journal of Fluid Mechanics | Cambridge Core
Kelvinangle may not always be 37 degrees in the presence of shear layers. This has applications in boat wake theory, with implications for fuel efficiency as well as maritime ocean surveillance in littoral waters
hydrodynamics  boat  wake  kelvin  angle  fluid  dynamics  research  surface  wave  pattern 
8 weeks ago by asteroza
APS -71st Annual Meeting of the APS Division of Fluid Dynamics - Event - How do wombats make cubed poo?
So, research how wombats make cubic poop may provide a line towards a third method of manufacturing soft cubic solids. Why is it cubic is speculated as due to ease of building piles, since wombats have poor eyesight.
cubic  feces  azimuth  elastic  tube  production  manufacturing  biology  fluid  dynamics  research  cube 
november 2018 by asteroza
Targeting chaotic orbits to the Moon through recurrence - Semantic Scholar
Takes 2 years to get from earth to the moon, but with 38% less fuel than a hohmann transfer. Slow boat is slow...
chaotic  orbit  orbital  transfer  earth  moon  LEO  astrogation  navigation  research  dynamics 
july 2018 by asteroza
APS -68th Annual Meeting of the APS Division of Fluid Dynamics - Event - Creating a urine black hole
So, taking a cue from the nanotube pillar design of Vantablack, these guys made a urinal splashguard that seems to work...
spashback  liquid  fluid  splash  mitigation  vantablack  materials  science  dynamics  research  technology  urinal  splashguard  toilet  humor  Delicious 
december 2015 by asteroza
Research project: VertiKUL
VertiKUL version one was like the Google early cargo drone, a BWB with high/low set rotors on tails as a tail sitter, but the wide wingspan when landing meant wind tossed it around. Version 2 now uses a permanent 45 degree tilt to the rotors, which provide partial lift in forward flight like some FPV racers.
cargo  UAV  drone  tailsitter  multicopter  quadcopter  tilt  hardware  electronics  devices  flight  dynamics  research  technology  Delicious 
september 2015 by asteroza
Ratcheting fluid with geometric anisotropy
Interesting pump configuration. Might be able to harvest waste vibration energy as a power source for small fluid flows.
ratchet  racheting  fluid  pump  geometry  sawtooth  biomimicry  physics  dynamics  hydrodynamics  research  technology  vibration  reciprocating  Delicious 
february 2015 by asteroza
Modlab » Archive » Underactuated Rotor for Simple Micro Air Vehicles
This appears to be a reimplementation the keyence revolutor mechanism for swashplateless rotor blade pitch control via motor pulse shifting.
offset  off  axis  hinge  rotor  blade  pitch  control  pulse  modulation  coaxial  underactuated  helicopter  multicopter  engineering  dynamics  keyence  revolutor  swashplateless  UAV  drone  research  technology  robotics  motor  Delicious 
december 2014 by asteroza
SDROsForFISO - Adamo_11-7-13.pdf
Interesting propellantless stable orbit alternative for asteroid retrieval/capture missions, for parking an asteroid near the moon. Possible alternative to traditional EML1/2 lunar ops.
selenocentric  distant  optimization  alternative  retrieval  asteroid  stable  orbit  SDRO  EML2  orbital  EML1  dynamics  mission  capture  retrograde  design  Delicious 
november 2013 by asteroza
Strait Power turbine is water-powered, shark-inspired (video) -- Engadget
This seems like a simple concentrating venturi duct, maybe something else is at play here...
Water  turbine  nozzle  duct  intake  design  power  generator  green  energy  hydrodynamics  fluid  dynamics  hardware  venturi  Delicious 
january 2011 by asteroza / Technology - Dyson launches the bladeless electric fan
I guess this is an application of fluidic control/coanda effect/ejector entrainment effect. Probably reynolds number scaling issues prevent this from being useful in other applications, but still neat. The interesting question is does it use less energy for a given mass flow?
dyson  air  multiplier  entrained  jet  bladeless  fan  hardware  electronics  devices  fluid  dynamics  Delicious 
october 2009 by asteroza
Classical and statistical mechanics of celestial scale spinning strings: Rotating space elevators
Oh this hurts my head. Basically, exploiting non traditional phenomena could allow a space elevator using unpowered climbers, the achilles heel of traditional linear space elevators.
space  elevator  design  architecture  climber  physics  rotating  loop  RSE  USRSE  LSE  nonlinear  dynamics  statistical  Delicious 
may 2009 by asteroza

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