where [f.sub.s] is the tangential stress at the contact surface of melt and die wall, [v.sub.s] is the tangential velocity
of the fluid, [v.sub.wall] is the tangential velocity
of the wall, and k and e are material parameters.
The discrepancy between the measurements and the predictions from BG interaction model may be explained by the fact that the ejection angle between the wall and the velocity of the secondary droplet is in the range of [5[degrees], 50[degrees]], and the tangential velocity
friction coefficient of the splashed droplet is randomly sampled in [0.6, 0.8], which are proved not appropriate to calculate the interaction process by Allocca .
Moreover, the tangential velocity
, u, is always tangent to the wall no matter what the orientation is, i.e., it is perpendicular to the wall normal vector and subsequently normal to the local radius of curvature.
The velocities of rotation and translation are not independent; they are constrained by the electron's tangential velocity
that is constant and equal to the speed of light.
The flow mechanisms in the heat exchanger tube equipped with the V-wavy surface are reported in terms of [[lambda].sub.2] isosurface, tangential velocity
vector in the transverse plane, and longitudinal vortex flow.
where A = [pi][R.sup.2.sub.B]; J = (1/2) [pi][R.sup.4.sub.B]; [R.sub.B] is the bonding radius; [S.sub.n] and [S.sub.t] are the normal stiffness and tangential stiffness, respectively; [[psi].sub.t] is the time step; [v.sub.n] and [v.sub.t] are the normal velocity and tangential velocity
of the particle, respectively; [[omega].sub.n] and [[omega].sub.t] are the normal angular velocity and tangential angular velocity of the particle, respectively.
Figures 15(a) and 15(b) show the tangential velocity
v at the same axial positions of x/R = 068, x/R = 168, and x/R = 2.37.
(5) Outlet boundary conditions: if no external traction is acting on the outlet, the normal force and tangential velocity
of the surface are zero; that is, [f.sub.n] = 0 and [v.sub.s] = 0.
Figures 4(a) and 4(b) illustrate tangential velocity
vector in transverse planes at various x/H positions in the square channel heat exchanger inserted with 45[degrees] wavy plate for V-Downstream and V-Upstream, respectively, at Re = 3000.
The angle between the velocity vector v and the tangential velocity
vector [v.sub.[theta]] is [gamma].
Unlike that hypothesis, it was found an inverted relation between reversible resistance and protein rejection, but this condition was achieved only in higher TMP and lower tangential velocity
. The poor correlation ([R.sup.2] = 0.682) was not highlighted the hypothesis of Obermeyer et al.
In my research, I've found that if a star has a tangential velocity
faster than 200 kilometers per second, it has to be old.