498 reputation
213
bio website tudelft.nl
location Delft, Netherlands
age 26
visits member for 1 year, 4 months
seen Apr 4 at 5:16

Oct
30
revised Why does the moment of approximation matter for the end result?
choose more appropriate tags
Oct
30
asked Why does the moment of approximation matter for the end result?
Oct
15
comment Approximations other than taylor series and pade approximation
Yes, I would like to have an approximate solution to get a feel for the way the result scales with $K_i$ and $Q_i$. Without having to scan a whole range of these parameters.
Oct
15
asked Approximations other than taylor series and pade approximation
Sep
16
answered Are there any surfaces that contain both positive and negative Gaussian curvature?
Jun
4
awarded  Enlightened
Jun
3
awarded  Nice Answer
May
26
comment A Math function that draws water droplet shape?
@Henry, indeed, a falling liquid droplet will be close to spherical with a slightly flattened bottom part. The shape with the tail is something you will only see for a droplet running down a surface. In that case the tail forms due to a balance of capillary and viscous forces.
May
21
revised Determine if the Series Converges and Explain approach
removed mathematically slopiness
May
18
comment Existence and uniqueness of Stokes flow
@Qmechanic Ok! I have corrected the referencing.
May
18
comment Existence and uniqueness of Stokes flow
Don't pin me down on it, but I believe the situation is only unsolvable if the far-field is unbounded
May
18
answered Existence and uniqueness of Stokes flow
May
13
awarded  Caucus
May
4
awarded  Citizen Patrol
May
3
revised Inaccuracy in numerical calculation of arclength of part of an ellipse
deleted 111 characters in body
May
3
accepted Inaccuracy in numerical calculation of arclength of part of an ellipse
May
3
comment Inaccuracy in numerical calculation of arclength of part of an ellipse
ok, this is pretty embarrassing. The mistake was in a function call where I had swapped the parameters of 2 ellipses. So I got the shape-plot for 1 ellipse (with b=2.5) while I got the integral for a different one (with b=0.52). Anyway, it's solved. Thanks for the effort and sorry about the dumb mistake
May
3
comment Inaccuracy in numerical calculation of arclength of part of an ellipse
Ah ok, so I am at least getting the same number. So maybe the error is already somewhere earlier: in the value of $\phi_s$. I will look into it and come back here when I sorted things out. Thanks for the help!! It's much appreciated
May
3
comment Inaccuracy in numerical calculation of arclength of part of an ellipse
You're right, they both are the same (I was missing a bracket), but still I get a much higher value. What I noticed by the way is that you use b=2.5 while I have b=0.52. What do you get with that smaller b?
May
3
comment Inaccuracy in numerical calculation of arclength of part of an ellipse
mmm that's odd. I found this for the integrand: $$a b \sqrt{\frac{b^4 \cos^2\phi+a^4 \sin^2\phi}{(b^2\cos^2\phi+a^2\sin^2\phi)^3}}$$ which is supposed to be the same according to ($\cos^2\phi+\sin^2\phi=1$) but apparently it is not????