Hi, here I am again. :)
I was overwhelmed with work in the last few days, so couldn't reply.
Yes, now I do understand what you intend. And your analysis is correct. If we put the pressure loss due to friction in the equations then - everything else being equal (piping, pressure difference...
Well, no... dm/dt and R are independent values.
The mass flow of a gas (dm/dt) is decided by you. For example, you can control it with a ball valve, which can be set more or less open.
R is a physical property of the gas used, and you have no control over it (if not by choosing another gas).
Not really. :)
Let's carry on from the second equation:
dm/dt = f * rho * V0
where:
dm/dt = mass flow of the gas
V0 = motor displacement
f = frequency of rotation
rho = gas density (0.176 kg/m3 helium; 1.225 kg/m3 air)
If you want to see the pressure in this relationship, the easiest way is to...
That is correct. You can find a very good and easy-to-read short essay about Kolmogorov theory here (PowerPoint file): http://www.bakker.org/dartmouth06/engs150/09-kolm.ppt
As said above, Kolmogorov theory deals with turbulent flows at "sufficiently" high Reynolds numbers, whilst N-S equations can give either laminar-flow solutions or turbulent-flow solutions, depending on initial and boundary conditions.
Think of a free uniform rectilinear flow, for example. If...
Hello, I have a problem...
I can't see the "Sigma" icon for creating LaTex code, even in advanced text mode...
I've tried both IE and Chrome, but still no icon there. What am I doing wrong?
1000 w/m2 is the standard value of irradiation, used for certification and comparison of PV cells - which is the case here, if I understood it well.
For example, see this tech sheet of a Sharp 167 W module: http://www.abcsolar.com/pdf/sharp167.pdf - the bottom of the page 2, where it reads...
It can be explained in simple terms, imho, by considering a general equation: m = rho * V
A time-derivative of this equation yields:
dm/dt = rho * dV/dT
or (since dV/dT = f * V0)
dm/dt = f * rho * V0
where:
dm/dt = mass flow of the gas
V0 = motor displacement
f = frequency of rotation...
The power of sunlight at the ground level, when all the (mean) atmospheric dissipations and reflections have been detracted, is very close to 1000 W/m2 (outside the atmosphere it's value is 1367 W/m2 at the mean distance Sun-Earth).
1000 W/m2 is also the standard reference value used for...
All in all, I cannot demonstrate my point of view, and you cannot do it with yours. And we could go on with this for the next couple of years, I think (btw: yes - I think therefore I observe, scupydog).
I agree with scupydog, this pub is closing and maybe it's time to go home. Anyone for a...