V. Golubev

Publications

2 Modelling the Sublimation-Desublimation Processes for Production of Ultrafine Powders

Authors: A. Brener, V. Golubev, A. Dosmakanbetova

Abstract:

The purpose of this work is to establish the theoretical foundations for calculating and designing the sublimationcondensation processes in chemical apparatuses which are intended for production of ultrafine powders of crystalline and amorphous materials with controlled fractional composition. Theoretic analysis of the primary processes of nucleation and growth kinetics of the clusters according to the degree of super-saturation and the homogeneous or heterogeneous nature of nucleation has been carried out. The engineering design procedures of desublimation processes have been offered and tested for modification of the Claus process.

Keywords: nucleation, Desublimation, controlled fraction composition, ultrafine powders

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1 Large-Eddy Simulations of Subsonic Impinging Jets

Authors: V. Golubev, L. Nguyen, R. Mankbadi

Abstract:

We consider here the subsonic impinging jet representing the flow field of a vertical take-off aircraft or the initial stage of rocket launching. Implicit Large-Eddy Simulation (ILES) is used to calculate the time-dependent flow field and the radiate sound pressure associated with jet impinging. With proper boundary treatments and high-order numerical scheme, the near field sound pressure is successfully obtained. Results are presented for both a rectangular as well a circular jet.

Keywords: Fluid Dynamics, Aeroacoustics, Jets, Large-Eddy Simulations

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