Projektipäällikkö Dmitry Gradov

Mobile phone: +358465470573
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Uploaded on: 02/03/2021

Current Organisation
Separation Science (Superior organisation: LUT School of Engineering Science)

Research Interest
Main idea of the current research is adoption of Computation Fluid Dynamics (CFD) tools for metallurgical unit design and optimization. Particular interest lies in modelling of batch stirred reactor for hydrometallurgical gold extraction. Batch process is modelled by CFD to capture primary phase flow field and secondary phases (air bubbles and solids) distribution. Baffled tank with Rushton turbine is an object of study. Multiphase modelling results are validated by means of Particle Image Velocimetry (PIV). PIV technique is capable to provide average velocity flow field of both single and multiphase flows. CFD for engineering application mostly explores Reynolds-averaged Navier-Stokes two equation models (RANS) which means that PIV validation suits current needs. When mixing is described successfully chemistry models can be coupled to get comprehensive model of batch reactor. Auxiliary work is currently going dedicated to modelling of flow caused by ultra sound inducing. Media of study are Newtonian and non-Newtonian liquids. Applied ultra sound produced no visible cavitation therefore flow description could be performed by RANS models. The output of the auxiliary work is expected to be a range of constants of RANS turbulence formulation in order to tune simple reactor systems with ultra sound agitation for experimental data fitting.

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Numerical simulation of gas-liquid hydrodynamics and mass transfer in agitated draft tube reactor and baffled stirred tank equipped with multiple Rushton turbines (2017)
A4 Conference proceedings
Gradov Dmitry, Han Mei, Tervasmäki Petri, et al.
10th World Congress of Chemical Engineering
Assessment of Interaction between Baffles and Impeller Blades in Stirred Tanks (2016)
A4 Conference proceedings
Gradov Dmitry, Laari Arto, Koiranen Tuomas
MATEC web of conferences
2016 6th International Conference on Chemistry and Chemical Process (ICCCP 2016)
Experimentally validated CFD model for gas-liquid flow in a round-bottom stirred tank equipped wit a Rushton turbine (2016)
A1 Journal article (refereed), original research
Gradov Dmitry, Laari Arto, Turunen Ilkka, et al.
International Journal of Chemical Reactor Engineering
Experimental Study of Thiosulphate Leaching in a Batch Stirred Rreactor (2016)
A4 Conference proceedings
Gradov Dmitry, Laari Arto, Koiranen Tuomas
Dynamics of Evolving Fluid Interfaces - DEFI Gathering physico-chemical and flow properties
Gold leaching in batch stirred tank (2015)
Gradov Dmitry
Abstracts of LUT Doctoral School conference presentations

Last updated on 2021-02-03 at 04:02

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