Flow comparison between

Boundary Slip of Liquids, Fig. 7 Velocity profile for (a) Couette and (b) Poiseuille flow comparison between molecular dynamics simulation, no-slip boimdary condition, and partial slip boundary condition... 

Velocity profile for (a) Couette and (b) Poiseuille flows. Comparison between... 

To design an air recirculation system it is necessary to know the performances of fans, air cleaners, and exhaust hoods included in the current system. The equations described here include the source generation rate and the total airflow rate through the room, which could be difficult to measure. The ratio between source rate and flow rate has the unit of concentration and should in fact be equal to the concentration without recirculation. The equations could thus be transformed to include the contaminant concentration without recirculation instead of this ratio. In this way a direct comparison between concentration without and with recirculation is possible. By using the described equations it is then possible to design an air recirculation system to result in the demanded concentration in a workroom. 

We also give calculations of the performance of some of these various gas turbine plants. Comparison between such calculations is often difficult, even spot calculations at a single condition with state points specified in the cycle, because of the thermodynamic assumptions that have to be made (e.g. how closely conditions in a chemical reformer approach equilibrium). Performance calculations by different inventors/authors are also dependent upon assumed levels of component performance such as turbomachinery polytropic efficiency, required turbine cooling air flows and heat exchanger effectiveness if these are not identical in the cases compared then such comparisons of overall performance become invalid. However, we attempt to provide some performance calculations where appropriate in the rest of the chapter. 

Fig. 9-17. Chromatographie response to a feed pulse. Comparison between experimental (points) and model (lines) results. (Pulse during 7.5 min flow rate 5 mL min f)...

Stevens, G. F., Elliott, D. F., and Wood, R. W., An experimental comparison between forced convection burnout in freon-12 flowing vertically upwards through uniformly and nonuniformly heated round rubes, AEEW-R426, H. M. Stationery Office, London (1965). 

The first part of this book deals with the characteristics of flow and heat transfer in the channels and comparison between conventional size and micro-channels, which are important to understanding micro-processes in cooling systems of electronic devices with high power density and many other applications in engineering and technology. 

Fig. 2.7 (d) Comparison between spray and micro-jet performance for two flow rates 50.56 ml/min [2.87 pl/mm s]. Parts (b-f) reprinted from Fabbri et al. (2005) with permission... 

We consider the problem of liquid and gas flow in micro-channels under the conditions of small Knudsen and Mach numbers that correspond to the continuum model. Data from the literature on pressure drop in micro-channels of circular, rectangular, triangular and trapezoidal cross-sections are analyzed, whereas the hydraulic diameter ranges from 1.01 to 4,010 pm. The Reynolds number at the transition from laminar to turbulent flow is considered. Attention is paid to a comparison between predictions of the conventional theory and experimental data, obtained during the last decade, as well as to a discussion of possible sources of unexpected effects which were revealed by a number of previous investigations. 

Fig. 5.15 Comparison between the experimental flow patterns obtained by Triplett et al. (1999a) and the experimental flow regime transition lines of Damianides and Westwater (1988) representing their 1 mm diameter cireular test section. Reprinted from Triplett et al. (1999a) with permission...

Comparison of Gas-Liquid Two-Phase Flow Characteristics Between Conventional Size Channels and Micro-Channels... 

Ide H, Kawahara A, Kawaji M (2006) Comparison of gas-liquid two-phase flow characteristics between mini-channels and micro-channels. In Proceedings of 13th International Heat Transfer Conference, Sydney Convention and Exibition Centre, Sydney, Australia, 13-18 August 2006, MPH-51... 

Comparison between water flow and surfactant solution was investigated by Klein et al. (2005). The experimental facility was designed and constructed as illustrated schematically in Fig. 6.19. 

Fig. 7 Comparison between daily flow (m s ) and sum of pharmaceutical compounds (ng L ) measured in the Llobregat river at Sant Joan Despi (Barcelona), between June and August 2008...

Fig. 2—Comparison of flow rates between different models.

Comparison between flame-sampled PIE curves for (a) m/z = 90 (C H ) and (b) m/z = 92 (C Hg) with the PIE spectra simulated based on a Franck-Condon factor analysis and the cold-flow PIE spectrum of toluene. Calculated ionization energies of some isomers are indicated. (From Hansen, N. et al., /. Phys. Chem. A, 2007. With permission.)... 

In this model, energy balances are set up for the reactor and the separator tube separately, and two equations are obtained. The gas holdup can then be obtained from combining these two equations. Details can be found in Zhang et al. [7]. The comparison between the measured and calculated cross-sectional mean gas holdups is shown in Fig. 5. It can be seen that there is a satisfactory agreement between the experimental and calculated gas holdup in the different operating conditions. Therefore, it is reasonable to conclude that the energy balance model used in this work can describe the circulation flow behavior in the novle internal-loop airlift reactor proposed in this work. 

The validity of the model is tested against the experiment. A ISOOcc canister, which is produced by UNICK Ltd. in Korea, is used for model validation experiment. In the case of adsorption, 2.4//min butane and 2.4//min N2 as a carrier gas simultaneously enter the canister and 2.1//min air flows into canister with a reverse direction during desorption. These are the same conditions as the products feasibility test of UNICK Ltd. The comparison between the simulation and experiment showed the validity of our model as in Fig. 5. The amount of fuel gas in the canister can be predicted with reasonable accuracy. Thus, the developed model is shown to be effective to simulate the behavior of adsorption/desorption of actual ORVR system. 

Many reports confirm notable reductions in reaction times when carrying out reactions under micro flow conditions. Concerning p-dipeptide synthesis, for example, a comparison between batch and micro-reactor processing was made for the reaction of Dmab-P-alanine and Fmoc-i-P-homophenylalanine [158]. While the micro reactor gave a 100% yield in 20 min, only about 5% was reached with the batch method. Even after 400 h, only 70% conversion was achieved. 

Lesage, T.,Verrier, C., Bazin, P. et al. (2004) Comparison between a Pt-Rh/Ba/Al203 and a newly formulated NOx-trap catalysts under alternate lean-rich flows, Top. Catal., 30, 31. 

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