Rao, Subaschandar
Overview
Works:  6 works in 6 publications in 1 language and 6 library holdings 

Roles:  Author 
Publication Timeline
.
Most widely held works by
Subaschandar Rao
A numerical model of an electrostatic precipitator by Shah Haque(
)
1 edition published in 2007 in English and held by 1 WorldCat member library worldwide
This paper presents a Computational Fluid Dynamics (CFD) model for a wireplate electrostatic precipitator (ESP). The turbulent gas flow and the particle motion under electrostatic forces are modelled using the CFD code FLUENT. Numerical calculations for the gas flow are carried out by solving the Reynoldsaveraged NavierStokes equations and turbulence is modelled using the kSf turbulence model. An additional source term is added to the gas flow equation to capture the effect of electric field. This additional source term is obtained by solving a coupled system of the electric field and charge transport equations. The particle phase is simulated by using Discrete Phase Model (DPM). The results of the simulation are presented showing the particle trajectory inside the ESP under the influence of both aerodynamic and electrostatic forces. The simulated results have been validated by the established data. The model developed is useful to gain insight into the particle collection phenomena that takes place inside an industrial ESP
1 edition published in 2007 in English and held by 1 WorldCat member library worldwide
This paper presents a Computational Fluid Dynamics (CFD) model for a wireplate electrostatic precipitator (ESP). The turbulent gas flow and the particle motion under electrostatic forces are modelled using the CFD code FLUENT. Numerical calculations for the gas flow are carried out by solving the Reynoldsaveraged NavierStokes equations and turbulence is modelled using the kSf turbulence model. An additional source term is added to the gas flow equation to capture the effect of electric field. This additional source term is obtained by solving a coupled system of the electric field and charge transport equations. The particle phase is simulated by using Discrete Phase Model (DPM). The results of the simulation are presented showing the particle trajectory inside the ESP under the influence of both aerodynamic and electrostatic forces. The simulated results have been validated by the established data. The model developed is useful to gain insight into the particle collection phenomena that takes place inside an industrial ESP
A parallel disc device for studying corrosion under intense flow conditions by Subaschandar Rao(
)
1 edition published in 2007 in English and held by 1 WorldCat member library worldwide
A novel electrochemical Parallel Disc Device (PDD) has been designed and built at the Process Engineering and Light Metals (PELM) Centre of Central Queensland University. This device, built primarily to study aspects of flow accelerated corrosion, consists of two discs separated by a precision controlled gap. The bottom disc (which accommodates the working electrode) is immobile while the top disc rotates and enables a flow of liquid between the discs. The gap between the discs can be set within the range 0.050 to 5.000 mm with a precision of 0.005 mm. The PDD is capable of generating very high wall shear rates and the shear of liquid at the working electrode is purely tangential as long as flow between the discs remains laminar. This paper presents results of preliminary Computational Fluid Dynamics (CFD) characterisations of the fluid flow in the gap between the parallel discs. In addition we present some results for the electrochemical reduction of dissolved oxygen at a copper PDD electrode
1 edition published in 2007 in English and held by 1 WorldCat member library worldwide
A novel electrochemical Parallel Disc Device (PDD) has been designed and built at the Process Engineering and Light Metals (PELM) Centre of Central Queensland University. This device, built primarily to study aspects of flow accelerated corrosion, consists of two discs separated by a precision controlled gap. The bottom disc (which accommodates the working electrode) is immobile while the top disc rotates and enables a flow of liquid between the discs. The gap between the discs can be set within the range 0.050 to 5.000 mm with a precision of 0.005 mm. The PDD is capable of generating very high wall shear rates and the shear of liquid at the working electrode is purely tangential as long as flow between the discs remains laminar. This paper presents results of preliminary Computational Fluid Dynamics (CFD) characterisations of the fluid flow in the gap between the parallel discs. In addition we present some results for the electrochemical reduction of dissolved oxygen at a copper PDD electrode
A sustainable production in sugar industries : study of an improved vacuum pan performance through numerical simulations by N. M. S Hassan(
)
1 edition published in 2009 in English and held by 1 WorldCat member library worldwide
This paper presents at improving existing vacuum pan (large cylindrical vessels with vertical heating surfaces) operation through numerical simulations, in particular for the sugar industries, and at enhancing the competitiveness of Australian industries. Therefore, this study investigates a Computational Fluid Dynamics (CFD) model for a single air bubble rising in nonNewtonian polymeric and crystal suspension. The bubble rise characteristics through different stagnant liquids in a vertical cylindrical column are modelled using the CFD code Fluent. Air bubble rise dispersed into the continuous liquid phase has been considered and modelled for two different bubble sizes. Bubble trajectory and velocity distributions were captured through a surfacetracking technique i.e. Volume of Fluid (VOF) method by solving a single set of momentum equations and tracking the volume fraction of each fluid throughout the domain. The simulated results of the bubble flow contours were validated by the experimental results and literature data. The model developed is capable of predicting the entire flow characteristics of different sizes of bubble inside the liquid column. The simulated data is used in sugar industries to gain knowledge, optimise and develop improved vacuum pan design that can achieve more productive performance and result in improved steam economy. The possible modification of the vacuum pan design enhances the sugar industrys competitive edge in the global market place by reducing production cost and less green house gas emissions
1 edition published in 2009 in English and held by 1 WorldCat member library worldwide
This paper presents at improving existing vacuum pan (large cylindrical vessels with vertical heating surfaces) operation through numerical simulations, in particular for the sugar industries, and at enhancing the competitiveness of Australian industries. Therefore, this study investigates a Computational Fluid Dynamics (CFD) model for a single air bubble rising in nonNewtonian polymeric and crystal suspension. The bubble rise characteristics through different stagnant liquids in a vertical cylindrical column are modelled using the CFD code Fluent. Air bubble rise dispersed into the continuous liquid phase has been considered and modelled for two different bubble sizes. Bubble trajectory and velocity distributions were captured through a surfacetracking technique i.e. Volume of Fluid (VOF) method by solving a single set of momentum equations and tracking the volume fraction of each fluid throughout the domain. The simulated results of the bubble flow contours were validated by the experimental results and literature data. The model developed is capable of predicting the entire flow characteristics of different sizes of bubble inside the liquid column. The simulated data is used in sugar industries to gain knowledge, optimise and develop improved vacuum pan design that can achieve more productive performance and result in improved steam economy. The possible modification of the vacuum pan design enhances the sugar industrys competitive edge in the global market place by reducing production cost and less green house gas emissions
Modelling of air bubble rising in water and polymeric solution by N. M. S Hassan(
)
1 edition published in 2009 in English and held by 1 WorldCat member library worldwide
This study investigates a Computational Fluid Dynamics (CFD) model for a single air bubble rising in water and xanthan gum solution. The bubble rise characteristics through the stagnant water and 0.05% xanthan gum solution in a vertical cylindrical column is modelled using the CFD code Fluent. Single air bubble rise dispersed into the continuous liquid phase has been considered and modelled for two different bubble sizes. Bubble velocity and vorticity magnitudes were captured through a surfacetracking technique i.e. Volume of Fluid (VOF) method by solving a single set of momentum equations and tracking the volume fraction of each fluid throughout the domain. The simulated results of the bubble flow contours at two different heights of the cylindrical column were validated by the experimental results and literature data. The model developed is capable of predicting the entire flow characteristics of different sizes of bubble inside the liquid column
1 edition published in 2009 in English and held by 1 WorldCat member library worldwide
This study investigates a Computational Fluid Dynamics (CFD) model for a single air bubble rising in water and xanthan gum solution. The bubble rise characteristics through the stagnant water and 0.05% xanthan gum solution in a vertical cylindrical column is modelled using the CFD code Fluent. Single air bubble rise dispersed into the continuous liquid phase has been considered and modelled for two different bubble sizes. Bubble velocity and vorticity magnitudes were captured through a surfacetracking technique i.e. Volume of Fluid (VOF) method by solving a single set of momentum equations and tracking the volume fraction of each fluid throughout the domain. The simulated results of the bubble flow contours at two different heights of the cylindrical column were validated by the experimental results and literature data. The model developed is capable of predicting the entire flow characteristics of different sizes of bubble inside the liquid column
Flow distribution inside an electrostatic precipitator : effects of uniform and variable porosity of perforated plate by Shah Haque(
)
1 edition published in 2007 in English and held by 1 WorldCat member library worldwide
This paper presents a numerical flow model applied to a 3D geometry of an electrostatic precipitator (ESP). The flow simulation is performed by using the computational fluid dynamics (CFD) code FLUENT. Realizable kSf model for turbulence condition inside the ESP is applied. In the simulation, the perforated plates are modeled as thin porous media of finite thickness with directional permeability. Perforated plates with both uniform porosity and variable porosity are considered for simulation. The results of the simulation are discussed and compared with onsite measured data supplied by the local power plant. The simulated results show reasonable agreement with the measured data
1 edition published in 2007 in English and held by 1 WorldCat member library worldwide
This paper presents a numerical flow model applied to a 3D geometry of an electrostatic precipitator (ESP). The flow simulation is performed by using the computational fluid dynamics (CFD) code FLUENT. Realizable kSf model for turbulence condition inside the ESP is applied. In the simulation, the perforated plates are modeled as thin porous media of finite thickness with directional permeability. Perforated plates with both uniform porosity and variable porosity are considered for simulation. The results of the simulation are discussed and compared with onsite measured data supplied by the local power plant. The simulated results show reasonable agreement with the measured data
A numerical approach to improve the flow model of an electrostatic precipitator by Shah Haque(
)
1 edition published in 2008 in Undetermined and held by 1 WorldCat member library worldwide
This paper presents a numerical approach to develop an accurate Computational Fluid Dynamics (CFD) model for an electrostatic precipitator (ESP). The flow simulation was performed by using the CFD code FLUENT. Numerical calculations for the air flow are carried out by solving the Reynoldsaveraged NavierStokes equations and turbulence is modelled using the realizable ke turbulence model. Simulation with uniform (ideal) velocity profile is compared with that with measured (real) velocity profile at the inlet boundary. The model developed by using the measured velocity profile at its inlet boundary showed more reliable simulation results
1 edition published in 2008 in Undetermined and held by 1 WorldCat member library worldwide
This paper presents a numerical approach to develop an accurate Computational Fluid Dynamics (CFD) model for an electrostatic precipitator (ESP). The flow simulation was performed by using the CFD code FLUENT. Numerical calculations for the air flow are carried out by solving the Reynoldsaveraged NavierStokes equations and turbulence is modelled using the realizable ke turbulence model. Simulation with uniform (ideal) velocity profile is compared with that with measured (real) velocity profile at the inlet boundary. The model developed by using the measured velocity profile at its inlet boundary showed more reliable simulation results
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BubblesDynamics Computational fluid dynamics Disks, Rotating Electrostatic precipitation Fluid dynamic measurements Fluid dynamics Fluid dynamicsSimulation methods Fluid mechanics Mechanical engineering NavierStokes equations Numerical calculations Scientific apparatus and instruments Shear (Mechanics) Shear flow Sugar trade
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