3
votes
While crossing a river should we cross it at wider regions or narrower region?
Presumably you mean crossing a river by foot. I have done this many times so here is an answer from the practical point of view: I always chose the widest shallowest region I could find. You want the ...
- 71
2
votes
While crossing a river should we cross it at wider regions or narrower region?
In general, it is safer to cross a river in wider, shallower regions of a river (see guides from, for example, US Fish and Wildlife, Bushwalking Victoria or New Zealand's Wilderness Magazine), though ...
- 135
2
votes
Accepted
Does viscosity increase temperature of a fluid at the cost of macroscopic kinetic energy?
Yes, the loss of macroscopic kinetic energy due to viscosity is transferred to microscopic averaged motion and thus heats up the fluid – this increases the thermal energy of the fluid (and thus the ...
- 12.2k
1
vote
Potential flow over a sphere in circular motion
We examine a sphere of radius $a$ moving in a circular path of radius $R$ with a constant angular velocity $\Omega$, where the fluid surrounding the sphere is assumed to be incompressible, inviscid, ...
- 176
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