Velocity, small

As demonstrated in Fig. 5.7, the result indicates that two-phase flow patterns observed in a 100 pm quartz tube are almost similar to those observed in a 25 pm silica capillary tube with several exceptions. One such exceptions is that in slug flow encountered at low velocities, small liquid droplets in a gas slug stick to the tube wall (Fig. 5.8). This fact is evidence that no liquid film exisfs befween fhe gas slug and the tube wall. 

Equal velocities, small-delta s approximation use q = 1 term only, si = sj = j ... 

Little patient coordination Aerosol exited with low velocity Small dead volume and quite operation High dose output and fast drug delivery No propellants requirements Large particle size and less efficient Microbiological contamination risk Possibility of degrading drug compound Poor portability and is expensive Requirement of electric power supplier... 

For small velocities, small binder viscosity, and large gap distances, the strength of the bridge will approximate a static pendular bridge, or... 

At relatively low velocities, small particles hitting a plastic material with Impact will abrade the surface and alter its properties. At some critical velocity, e.g. of a vehicle or blowing air the target surface is penetrated and the particles are deformed or break up as they pass into the material. Penetration of the plastic surfaces by the particulate matter is usually accompanied by the formation of a deep cylindrical cavity of the target plastic. 

The equilibrium or algebraic Eulerian model with conditional velocity small particle Stokes number and non-negligible polydispersity (momentum-balance equation only for the continuous phase if the system is dilute or for the mixture of continuous and disperse phases if the system is dense). 

The section of column wall directly opposite a bottom feed (or reboiler return) nozzle is often prone to corrosion and erosion attacks. High inlet velocities, small column diameters, and corrosive chemicals are conducive to this problem. The author has experienced a case where metal was thinned and the colximn wall was eventually punctured opposite the bottom inlet of a 2.5-ft-diameter column. Installing an impingement plate on the wall will shield it from such corrosion and erosion attacks. 

Thus, there is a small vertical component of velocity (small as compared to its longitudinal counterpart) present in the liquid. Suppose the Reynolds number of the arising flow is small. To estimate Re, let s take hi as the characteristic linear size and Wmax as the characteristic velocity, where Umax is the maximum longitudinal velocity on the free surface that is induced by the surface tension gradient. Since the shape of the surface changes slowly along the x-axis, we can approximate VsL dL/dx. From the condition (17.75), it follows that fi du/dy) = d Ljdx. Inasmuch as (duldy) Wmax/ i, we have... 

By increasing the ray velocity number of particules and particule weight collected decreased. It is v clear that porosity of the filter effects the number of particules and particule weight collected. By increasing the spray velocity, small particules passes from die pores but bigger particules collided to die filter and scattered. 

Mass transfer during drop formation can be quite significant. After formation the drop falls (or rises) through the continuous phase at its terminal velocity. Small drops (<2 mm), those in the presence of surfactants, or those for which the continuous-phase viscosity is much less than the drop viscosity behave as rigid spheres with little internal circulation. For this situation the continuous-phase coefficient can be obtained from correlations such as Eq. (2.4-38) indeed, much of the data for this correlation were obtained from evaporation rates of pure liquid drops in a gas. If no circulation is occurring within the drop, the mass transfer mechanism within the drop is that of transient molecular diflusion into a sphere for which solutions are readily available (see Section 2.3). 

Cone penetration test Dilatometer test Shear wave velocity Small strain shear modulus Standard penetration test... 

Let us consider an X-ray beam propagating along the x-axis and encountering an electron at the experimental origin, O. If this electron has a velocity small compared with the velocity of light, c, it will be accelerated by interaction with the oscillating electric field of the X-ray beam and will become a source of radiation at the same frequency as the X-rays. This effectively gives rise to... 

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