Diffusional Deposition of Nonvolatile Species in Gas Ducts

The mathematics of diffusional deposition is the same for particles ranging from atoms to aerosol particulates. Because of smaller diffusion coefficients, tiny aerosols deposit more slowly than do the molecular entities. 

3 Production of Transactinoid Elements, Synthesis and Transportation of Compounds 

Bottom Penetration of an irreversibly adsorbable species through circular tubes in laminar flow. Analytical solution for the developed flow is Eq. 2.43, that engineering is Eq. 2.58 with Sh from Eq. 2.57. Engineering formula for the developing flow is Eq. 2.57 with Sh substituted from Eq. 2.61 penetration values for some reduced distances larger than 0.5 are shown in the right bottom comer. 

In practice, it is difficult to introduce the radioactive nuclides into streaming carrier gas without disturbing the hydrodynamic patterns of the flow. Still, the analytical and engineering solutions to the problem of hydrodynamically developed flow proved useful in mathematical simulations of the gas-solid (thermo) chromatography (see Sect. 4.4). The two solutions are compared in the top of Fig. 3.6 their agreement is reasonable. 

There are several engineering solutions available for both hydrodynamically and diffusionally developed turbulent flow. The most common is that by Eq. 2.53 in Sect. 2.2.3. This criterion relationship can be deciphered in terms of the involved variables to elucidate the corresponding dependencies [10]. We come to Eq. 2.56 from which it follows that 

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