3,560 reputation
21232
bio website
location
age
visits member for 2 years, 11 months
seen 8 hours ago

Dec
14
comment How to calculate the value of gravitational acceleration of my town
You say that the centrifugal contribution is really small, but what about that height variation? From see level to $2km$ height, it gives less than $0.1\%$ deviation. You should give more number to support your statement that the answer by @Paul is not relevant.
Dec
8
comment Heat equation with heat radiation and heat transfer
I don't think the matrix solving part is particularly relevant here (just use a standard library). On the other hand, you completely skip over boundary conditions, which is important from a physical point of view.
Nov
27
comment Maximum velocity in a viscous fluid
@Gummybears I recommend you to consult a textbook on fluid mechanics. Otherwise, start here: en.wikipedia.org/wiki/Reynolds_number (and follow the link to the pages "Laminar flow" and "Turbulence")
Nov
26
comment Maximum velocity in a viscous fluid
For laminar flows, yes: en.wikipedia.org/wiki/… . For turbulent flows the problem is much, much more complex.
Nov
21
comment Length of Day and year on massive Earth
Maybe try worldbuilding.stackexchange.com
Nov
20
comment What is the point of this type of graph? (Projectile)
@RelentlessPursuit It would also help if you could show an example?
Nov
16
comment What is the minimum bend radius of a square optical fiber on a microfluidic chip interface?
What is your concern?
Nov
9
comment Why is the dynamic pressure not a vector quantity?
Do you know why kinetic energy is a scalar, and not a vector?
Oct
31
comment How do you pronounce $\vec{A} \cdot \vec{B}$ and $\vec{A} \times \vec{B}$?
I downvoted because this answer is wrong in my opinion. Why bar? These are vectors.
Oct
31
comment Flow in the strip $0 < x < \pi/2$, $y > 0$
@glebovg Check out: en.wikipedia.org/wiki/Stream_function
Oct
26
comment finding equation of a water droplet
@Hossein I don't have really good suggestions actually. I was thinking about using dye, but that would not help you here. Suspended particle can be an alternative, but you also don't want to influence the liquid properties. Good luck anyhow!
Oct
26
comment finding equation of a water droplet
@Hossein Nice update. I don't see anything contained in these images already that could help. I am not experienced with experiments, but aiming lasers at droplets sounds really complicated, maybe it is better to try simple illumination first, and try to select based on some shadowing somehow.
Oct
26
comment finding equation of a water droplet
@Hossein Would it be possible to add a sample picture of both camera's? As I understand now, you are only looking at the boundary of the droplet, by which you automatically disregard a lot of information. As per the answer, you need to distinguish between only a few options, but maybe you already have this information?
Oct
24
comment How do the flow equations relate to the actual situation?
@tpg2114 I agree with you, but I think this is more a difference in terminology, i.e., some people call the condition at x=0 initial condition as well (not me!)
Oct
24
comment How do the flow equations relate to the actual situation?
I have a small remark with respect to your post. You name the equation incompressible, but still want to solve for $\rho$. Later you mention four unknowns (instead of 5). This is a contradiction.
Oct
2
comment Weighing with One-Foot Scale
@Jim Obviously, for this you have to include measurement errors.
Oct
1
comment Drag force on a flat plate
What is $C$ for your case?
Sep
30
comment Branching lemon drop “smoke rings”
I encountered this movie, which provides some proof for your answer: youtube.com/watch?v=Tfi8BLca07M
Sep
25
comment An alternate approach to find variation of gravitational acceleration with respect to depth of an object in Earth
I think it is more a mathematical problem like this. But you can only approximate them as point particles in the far field limit. You will have to integrate the forces itself, i.e., the y-componentn of the 1/r^2. You see why people like the spherical shell approach?
Sep
24
comment Degree of freedom paradox for a rigid body
Why would the number of constraint depend on $N$ for a rigid body?