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location Atlanta, GA
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visits member for 3 years, 4 months
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I'm working on my PhD in aerospace engineering, specializing in computational turbulent combustion. My focus is primarily on massively parallel algorithms and computational methods for solving fluid and structural mechanics problems. Primary work is done in Fortran (90, 95, and 2003) but recent work has me branching into python, C and C++.

I'm also interested in international affairs and law.

Also interested in applying computational techniques to sports, in particular cycling aerodynamics and performance optimization. Particular emphasis on track cycling and time trialing.


1d
comment Are atoms bad and good?
I'm voting to close this question as off-topic because it is not about physics but about health/biology and the effect different atoms have on the body.
1d
reviewed Approve Are atoms bad and good?
1d
revised Turbulence and art
added 732 characters in body
1d
answered Turbulence and art
Apr
21
comment How to solve highly oscillating differential equation
If you have to resolve the high frequency oscillations, you have no choice that I'm aware of. If, however, you only care about some time scale between the smallest and steady state, you can use an implicit scheme to avoid the stiffness problem and pick a time step that gives you adequate resolution of the highest-frequency mode you are interested in solving.
Apr
20
comment How can I add a rounded trailing edge to an airfoil?
I'm voting to close this question as off-topic because it is not related to physics.
Apr
18
comment Find parameters of blood constitutive equation
So what did you measure? And if you plot what you measured, you should see approximately 3 regimes (at least if those equations in your question are correct). And if you do see those 3 regimes, you should be able to curvefit your data within those regions based on those expressions (and it won't be linear -- those equations are not linear everywhere, and blood is non-Newtonian so there shouldn't be a linear relationship). So I guess all of this boils down to what have you done and what have you tried?
Apr
18
comment Which one is colder? Zero temperature ice or zero temperature water?
If you already know that metal feels colder than the wall because of conductivity, why don't you look up the conductivity of ice and water and answer this yourself?
Apr
17
comment Could Navier-Stokes equation be derived directly from Boltzmann equation?
Look up the Chapman Enskog equations.
Apr
16
comment Why does the lake surface appear darker in some areas?
I would agree with that from this image. I was just adding more possibilities that might happen in general.
Apr
16
comment Why does the lake surface appear darker in some areas?
It could also just be sudden changes in depth -- light water may have a sandbar under it or something. Or it could be due to difference in what is under water -- plants or dark rocks or something.
Apr
11
comment Tension and compression in bicycle wheel spokes - what holds the wheel in place?
Awesome update. The trispoke carbon wheels act as columns, like the old wooden wagon wheels, and not like the wire spokes. So those do behave entirely differently as you noted.
Apr
10
comment Tension and compression in bicycle wheel spokes - what holds the wheel in place?
The other way to think about it -- when you build a wheel (which is really fun, I like it a lot), you tension all of the spokes evenly and it's tensioned such that the bottom spokes "being compressed" are still in tension, just less tension than "uncompressed". In other words, let's say you tension everything to 10 units. Under weight, the spokes on the top will have a tension of 12 units and the spokes on bottom will have a tension of 8 units.
Apr
10
comment Tension and compression in bicycle wheel spokes - what holds the wheel in place?
No, that's not really how it works. @Floris covers it pretty well, it's very weak no matter how you look at it.
Apr
10
comment Tension and compression in bicycle wheel spokes - what holds the wheel in place?
And I would actually say "vanishingly small amounts" are supported by compression. It takes very little force to buckle a spoke in compression.
Apr
10
comment Tension and compression in bicycle wheel spokes - what holds the wheel in place?
Related question: physics.stackexchange.com/questions/94001/…
Apr
9
comment Are there any scales other than temperature that have different zero points?
I think my comments just go to show that the intent of the question isn't very clear... It took several read-throughs and your comments to understand what you are trying to get it.
Apr
9
comment Are there any scales other than temperature that have different zero points?
Celsius is not an absolute temperature scale. But Rankine is, and $0~\text{R} = 0~\text{K}$.
Apr
9
reviewed Approve Are there any scales other than temperature that have different zero points?
Apr
7
comment How can a rotating cylinder produce lift?
If you really knew how the Magnus effect worked, you would already know the answer your question. I don't have time to answer it, I was merely providing you with information on where/what to look for. And just a hint, it's due to viscosity -- turns out almost everything in fluids works back to viscosity.