Thank you for your help.
We know the normal for spherical particle ( for sphere we know how the normal) but I need to find the normal for non-spherical shape.
If we say the radius r=R(t)+epsilon R(theta,t)
then how can I find the normal for that form.?
I think the normal will be
n=n0+epsilon n1...
Thank you for your help.
We know the normal for spherical particle ( for sphere we know how the normal) but I need to find the normal for non-spherical shape.
If we say the radius r=R(t)+epsilon R(theta,t)
then how can I find the normal for that form.?
I think the normal will be
n=n0+epsilon n1...
Let's say we have r=R( theta, phi, t) on the surface of the particle and need to find the normal vector in Spherical Coordinate system. We know that, the unit vector =grad(r-R( theta, phi, t)) / |grad((r-R( theta, phi, t))|
where grad is Spherical gradient operator in term of e_r, e_\theta...
Dear BvU,
Thank you for your replay, yes the equation is right.
The field equation is diffusion equation with 2 free boundary conditions
I applied the Fourier transform for the diffusion and the boundary conditions and finally i got this first ODE
I stuck on it ?
any idea please?
Can anyone help me to solve a differential equation?
I want to solve
∂v(p,t)/∂t=-p^2 v(p,t)-sqrt(2/pi)∫v(p,t)[1-δ(t)R(t)]dp+sqrt(2/pi)[δ(t)R^2(t) C]
with initial data v(p,0)=0
where C is constant and the integration from zero to infinty
Any suggestion please?
Solution by volterra integral...
Hi there
I need to know the density, viscosity, heat capacity,and temperature for the oil or crud oil?
Also I need to know the wall temperature for pipe?
Can anyone help me please ?
Hi there
Can anyone tell what is the meaning of boundary conditions for temperature distribution in a flowing viscous fluid in a pipe ?
for example I need some one explane for me this:
T = T1 at r = R, x<0
T = T0 at x = 0, r<R
where T1 is a temperature of well and T0 is a temperature...