Modeling of Technologically Important Hydrodynamics and Heat/Mass Transfer Processes during Crystal Growth

2004 ◽  
pp. 155-186 ◽  
Author(s):  
V. I. Polezhaev
Keyword(s):  
Mass Transfer ◽  
Crystal Growth ◽  
Heat Mass Transfer ◽  
Transfer Processes ◽  
Mass Transfer Processes

Mass transfer processes in KDP crystal growth from solutions

1987 ◽  
Vol 84 (3) ◽  
pp. 509-514 ◽  
Author(s):  
V.I. Bredikhin ◽  
V.P. Ershov ◽  
V.V. Korolikhin ◽  
V.N. Lizyakina ◽  
S.Yu Potapenko ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Crystal Growth ◽  
Growth From Solutions ◽  
Kdp Crystal ◽  
Transfer Processes ◽  
Mass Transfer Processes

Numerical investigation of heat-mass transfer processes in hydrothermal growth system

2006 ◽  
Vol 289 (2) ◽  
pp. 652-658 ◽  
Author(s):  
V.N. Popov ◽  
Yu.S. Tsivinskaya ◽  
T.B. Bekker ◽  
K.A. Kokh ◽  
A.E. Kokh
Keyword(s):  
Mass Transfer ◽  
Numerical Investigation ◽  
Heat Mass Transfer ◽  
Hydrothermal Growth ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Growth System

scholarly journals Modeling the mass transfer processes in the growth of KDP crystals from solution

2019 ◽  
Vol 21 (1) ◽  
pp. 26-34
Author(s):  
N. A. Verezub ◽  
V. L. Manomenova ◽  
A. I. Prostomolotov
Keyword(s):  
Mathematical Model ◽  
Aqueous Solution ◽  
Mass Transfer ◽  
Crystal Growth ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Kdp Crystals

Finding the conditions of high-speed single crystal growth with an appropriate quality is a priority for the industrial production of crystalline materials. Crystals of potassium dihydrogen phosphate (KDP) are important optical materials, they are grown from an aqueous solution and an increase in the rate of growth and quality of a single crystal is of great practical importance.In this paper, mathematical simulation of hydrodynamic and mass transfer processes in growing KDP crystals is performed. The flow and mass transfer are modeled within the framework of continuous medium, which is considered as an aqueous solution of a special salt — potassium dihydrogen phosphate. This salt dissolves in water to a saturation level at a high temperature. Then, such supersaturated solution is used to grow crystals at lower temperatures in non-flowing and flowing crystallizers. The mathematical model is considered in a conjugate formulation with allowance for mass transfer in the«solution—crystal» system. Local features of hydrodynamics and mass transfer in a solution near the surface of a growing crystal are determined, which can affect on the local (for a particular place and direction) crystal growth rate and the formation of defects. The requirements to the crystallizers that provide the «necessary» hydrodynamics in the solution are discussed. Its validation is shown for the flow around a long horizontal plate simulating the growing facet of the crystal. The rate of precipitation of salt was evaluated by the proposed mathematical model, which matches the calculation of solution flow according to the Navier-Stokes equations for an incompressible fluid with a thermodynamic condition for the normal growth of a face under conditions of two-dimensional nucleation. The action of the flowing crystallizers was analyzed for various solution inflows (axial and ring) and its outflow through the axial bottom hole.

Mathematical modeling of timber elastic-viscous-plastic deformation in the wood drying process

10.12737/4522 ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 166-177
Author(s):  
Соколовский ◽  
Yaroslav Sokolovskiy ◽  
Крошный ◽  
Igor Kroshnyy ◽  
Прусак ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Mass Transfer ◽  
Plastic Deformation ◽  
Porous Materials ◽  
Heat Mass Transfer ◽  
Drying Process ◽  
Transfer Processes ◽  
Mass Transfer Processes ◽  
Mechanics Characteristics ◽  
A Current

In the paper there is described solving a current scientific problem of mathematical modeling of heat-mass transfer processes and elastic-viscous-plastic deformation taking into account the mechanics and sorption creep in hygroscopic capillary-porous materials with variable anisotropic heat and mechanics characteristics what is of importance for the rational choice and substantiation of energy conservative technologies of timber drying under the conditions of necessary qualitative production providing.

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