Ballistic deposition

Csucs G and Ramsden J J 1998 Generalized ballistic deposition of small buoyant particles J. Chem. Phys. 109 779-81... 

Void [52] developed a variety of ballistic deposition models to simulate sedimentation processes. Void used ballistic models to determine deposition densities for spherical particles which traveled via vertical paths and were deposited on horizontal surfaces. Recently, Schmitz et al. [53] used a ballistic aggregation model to describe particle aggregation at the surface of a crossflow microfiltration membrane. Schmitz and co-workers were able to account for interfacial forces empirically, and demonstrated the influence of physical and chemical variables on the resulting morphology of the fouling deposits (such as aggregate density variation with depth, and influence of shear flow and re-entrainment properties on fouling deposit density and porosity). 

The growth of films via SCBD can be viewed as a random stacking of particles as for ballistic deposition [33,34]. The resulting material is characterized by a low density compared to that of the films assembled atom by atom and it shows different degrees of order depending on the scale of observation. The characteristic length scales are determined by cluster dimensions and by their fate after deposition. Carbon cluster beams are characterized by the presence of a finite mass distribution and by the presence of different isomers with different stabilities and relativities. Due to the low kinetic energy of clusters in the supersonic expansion stable clusters can survive to the deposition, while reactive isomers can coalesce to form a more disordered phase [35]. 

Family, F. and Vicsek, T., Scaling of the active zone in the Eden process on percolation networks and the ballistic deposition model, J. Phys. A, 18, E75, 1985. 

Surface scaling parameters for a number of nonequilibrium atomistic models have also been established [6, 10]. Continuum equations for the surface motion have to be used to find a solution for discrete models. Thus, for ballistic deposition [14] and the Eden model [15] the inter ce saturates, resulting in a = 1/2 and P = 1/3 for Z>pop = 2, and a 0.35 and 0.21 for Z>top = 3. Conversely, from the random deposition model P - 1/2 and, since the correlation length is always zero, fire interface does not saturate and, therefore, a is not defined. Depending on the rules used in the simulations, for the atomistic model including surfece difrusion a = 3/2 and p = 3/7 [6], a = 3/2 and p =... 

Schlichting H. Boundary-layer theory. New York McGraw-Hill Book Company 1979. Tennekes H, Lumley JL. A first course in turbulence. Cambridge, MA MIT Press 1972. Dasgupta R, Roy S, Tarafdar S. Correlation between porosity, conductivity and permeability of sedimentary rocks—a ballistic deposition model. Physica A Stat Mech Appl 2000 275 22-32. Bejan A, Nield DA. Convection in porous media. New York Springer 2006. 

Fig. 2 A Multi-cluster CCA-type lattice reconstruction of SI (each point represents a primary silica sphere) B. Single-Cluster DLA-type off-lattice reconstmction of SI stmcture (Sphere DLA) C. Center attraction ballistic deposition reconstmction of S4 D. Comparison of the autocorrelation functions of reconstracted SI (left) and S4 (right) silica gels (points), with the experimental ones (solid lines).

A porous layer formed by ballistic deposition of highly branched, fractal Tumbleweeds on a fence. 

Figure 2.5 Bright-field TEM images of ballistically deposited [a] silicon and [b] germanium nanocrystals.

G. Heinrich, M. Kliippel. A hypothetical mechanism of carbon black formation based on molecular ballistic deposition. Kautsch. Gummi. Kunstst., 44, 419-423, 1991. 

Tests showed the proplnts to be-.of relatively low stability, unduly volatile hygroscopic. Ballistic tests gave results indicating the proplnts to have less ballistic potential than Pyrocellulose, and to deposit unburned residue in the rifle barrel. The proplnts, represented by the two samples, were considered to be of little promise for use in military ammo Ref A.J. Phillips, Study of Propellant Powder Submitted by Dr Frans Jablonsky , PATR 796 (Jan 1937)... 

R.E. Reisler, Multiburst Environment-Simultaneous Detonations Project Dipole West , BRL-1766, Ballistic Res labs, Aberdeen Prov Gmds (1975) 150) Ya.M. Vasil ev, Deposited... 

Fig. 6. Formation of the granular structure of the cylindrical pellet by the mechanism of sequential deposition of individual grains, the so-called ballistic packing.

The temperature region of surface kinetic control expands at lower pressures. Surface kinetics also can be attained by increasing the gas flow velocity. At low gas flow velocities, the deposition is fully thermodynamically controlled. A substantial increase of the gas flow will push the operation to enter the mass transport controlled regime. Finally, surface kinetic control is reached at yet still higher gas flow velocities. In ultra-high vacuum OMMBE processes the molecules entering the reactor from the source behave ballistically, i. e., they travel to the substrate without collisions either with other molecules or the reactor walls. This is termed the molecular flow regime. In this unique case, neither convection, either forced or natural, nor diffusion, plays a role in... 

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