Velocity actual

These values are to be used in guides in establishing first estimates of lower limiting vapor velocities. Actual values should be calculated as outlined in the following. 

So far we have said nothing about the range of velocities actually found in a gas sample. In a real gas there are large numbers of collisions between particles. For example, when an odorous gas such as ammonia is released in a room, it takes some time for the odor to permeate the air, as we will see in Section 5.7. This delay results from collisions between the NH3 molecules and 02 and N2 molecules in the air, which greatly slow the mixing process. 

Single-phase flow means that only one fluid phase is present in the void space (implying, most importantly, that no fluid-fluid interface exists). The superficial velocity i is a volume flux based on the total cross section of the material. (For flow in a packed colunm, V = Q/A, where Q is the volumetric flow rate and A is the column cross-sectional area.) The interstitial velocity, Vint = v/e, better characterizes the average fluid velocity actually present in the voids. 

Terminal Velocity. Drawn to the earth through gravitational attraction, a bomb released from an aircraft falls with an increasing speed. This acceleration due to gravity is retarded by the increasing density of the air as the bomb nears the earth and as velocity increases. The velocity of the bomb increases as it falls earthward, but the acceleration decreases with each second of travel until there is no acceleration and the bomb fails with a constant velocity. This ultimate velocity is known as the termirud velocity of the bomb. It is really a function of a given bomb design, dependent upon the aerodynamic characteristics of 3 bomb, rather than the practical velocity actually obtained, which is called the impact velocity... 

It is of considerable interest to calculate quantum velocity correlation functions using CMD. In Fig. 10, the velocity (actually momentum) correlation function is shown for the nonlinear oscillator in Eq. (3.85) at /3 = 10. This simple test was again designed to compare the exact result with the CMD estimate. The latter is clearly very accurate. 

One research report showed that increasing the face velocity actually increased the contamination within the hood (395), presumably because of increased turbulence. Other tests culminated in the work of Caplan and Knud-son, who developed a standardized procedure to measure hood efficiency (74). They defined hood efficiency by the degree of containment the relative ability of a fume hood to contain a standard amount of airborne contaminants compared with the amount that escapes into the operator s breathing zone. The hood in-... 

The above example shows that DEP trap is also successful at high velocity. Actual DEP trap for biological cells is already available. In some DEP trap, spiral electrodes are used to trap the biological cells, that is, cloud of yeast cells. The yeast cells are caught at the center of the spiral electrode where the gradients are highest. The yeast cells are carried away by the liquid flow when the applied voltage to the electrodes is released. 

V erosion is line erosion velocity, in ft/sec p is fluid density, in Ib/fl3. For solid free or non-conosive fluid, this is a conservative estimation of line erosion velocity. Actual erosion velocity may be 150 to 200% hi er. [1 ]... 

The average spatial thermal flux is actually the total neutron density times 2200 m/sec. This is true because the absolute thermal flux is measured with l/v-absorber, using its cross section at this standard velocity. The macroscopic fission cross section of U is that for the same velocity. Actually, since this cross section does not have a l/v-dependence, a correction can be made to make it an equivalent l/v-cross section, which will give the correct fission rate in Eq. (4). This correction is based on a Maxwellian neutron distribution and is a function of the neutron temperature. The temperature of the neutrons in the AGN-201 core is approximately 350 K, which corresponds to a correction factor of 0.98. 

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