Name | Dr. Nepal Chandra Roy | |
Designation | Associate Professor | |
Last Degree | M. S. (Applied Mathematics, DU), Ph. D (Hokkaido University, Japan) | |
Summary of Educational Qualifications
Doctor of Philosophy |
Name of the University Country Degree Awarded |
: Hokkaido University : Japan : March, 2014 |
Master of Science (Thesis Group) |
Name of the University Subject Result Year of Passing |
: University of Dhaka : Applied Mathematics : First Class (1st Position) : 2004 (held in 2007, result published in 2008) |
Bachelor of Science |
Name of the University Subject Result Year of Passing |
: University of Dhaka : Mathematics : First Class (1st Position) : 2003 (held in 2005, result published in 2006) |
Administritive Positions
Student Advisor, Department of Mathematics, University of Dhaka. From August 28, 2014 to date.
House Tutor, Jagannath Hall, University of Dhaka. From May 24, 2016 to date
Projects
L. K. Saha and N. C. Roy, “Investigation of the combustion of solid fuel in porous medium”, Ministry of Science and Technology, Bangladesh, 2015-2016, 3,00,000 BDT.
L. K. Saha and N. C. Roy, “Simulation of convective flow in a channel containing multiple obstacles over backward and forward facing steps by LBM”, Ministry of Science and Technology, Bangladesh, 2017-2018, 2,00,000 BDT.
Graduate Student's Supervision
Sadia Masud, Numerical study of mixed and natural convection flow over a sphere and an axisymmetric body (2016).
Shahela Sultana, Numerical study of unsteady free convection over a vertical wavy surface (2014).
Tajnin Rahman, Unsteady laminar boundary layer flow past a heated cylinder (2015).
Research Papers
Nepal C. Roy, Natural convection of nanofluids in a sqaure enclosure with different shapes of inner geometry, Physics of Fluids 30, 113605 (2018). doi:10.1063/1.5055663
Nepal C. Roy, R. S. R. Gorla, Natural convection of a chemically reacting fluid in a concentric annulus filled with non-Darcy porous medium, Internaltional Journal of Heat and Mass Transfer, Vol. 127, pp. 513-525 (2018).
Nepal C. Roy, Modeling of a reactor with exothermic reaction bounded by two concentric cylinders, Physics of Fluids 30, 083604 (2018). doi:10.1063/1.5041303
Nepal C. Roy, Md. A. Hossain, R. S. R. Gorla, Free and forced convection flow past a cylinder with slip boundary conditions, Communications in Numerical Analysis (Accepted).
Nepal C. Roy, R. S. R. Gorla, Effects of radiation and magnetic field on mixed convection flow of non-Newtonian power-law fluids across a cylinder in the presence of chemical reaction, Heat and Mass Transfer, Vol. 55, No. 2, pp. 341–351 (2019). doi:10.1007/s00231-018-2413-4
Nepal C. Roy, Md. A. Hossain, R. S. R. Gorla, Combustible boundary-layer flows along inclined hot surfaces with streamwise surface temperature variations, Journal of Thermophysics and Heat Transfer, Vol. 33, No. 1, pp. 246–253 (2019).
Nepal C. Roy, T. Rahman, M.A. Hossain, R.S.R. Gorla, Boundary-layer characteristics of compressible flow past a heated cylinder with viscous dissipation, Journal of Thermophysics and Heat Transfer, Vol. 33, No. 1, pp. 10–22 (2019). doi:10.2514/1.T5400
Nepal C. Roy, Modeling of a closed two-dimensional reactor bounded by a wavy wall, Combustion Theory and Modeling, Vol. 22, No. 4, pp. 666–693 (2018). doi:10.1080/13647830.2018.1441445
Nepal C. Roy, Convection characteristics in a closed vessel in the presence of exothermic combustion and ambient temperature oscillations, International Journal of Heat and Mass Transfer 116C, 655–666 (2018). http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.09.058
Nepal C. Roy, Theoretical approach to the onset of convection in a porous layer, Transport in Porous Media, Vol. 118(2), 281-299 (2017). doi: 10.1007/s11242-017-0858-4
Nepal C. Roy, Theoretical investigation of the instability of convection in a horizontal porous layer, Special Topics & Reviews in Porous Media: An International Journal, Vol. 8, No. 3, pp. 197–210 (2017).
Nepal C. Roy, R. S. R. Gorla, Unsteady MHD mixed convection flow of a micropolar fluid over a vertical wedge, Int. J. of Applied Mechanics and Engineering, Vol. 22, No. 2, pp. 363–391 (2017). doi:10.1515/ijame-2017-0022
M. N. Firoza, Nepal C. Roy and Md. Anwar Hossain, Conjugate heat and mass transfer on fluctuating mixed convection flow along a vertical wedge with thermal radiation, Int. J. of Applied Mechanics and Engineering, Vol.22, No.3, pp. 539–565 (2017).
Nepal C. Roy, M. Anwar Hossain, Unsteady magnetohydrodynamic mixed convection flow of micropolar fluid past a permeable sphere, Journal of Thermophysics and Heat Transfer, Vol. 31(3), 686-699 (2017). doi: 10.2514/1.T5038.
Abdullah A. A. A. Al-Rashed, Nepal C. Roy, Md. Anwar Hossain, Effects of viscous dissipation on unsteady mixed convection heat transfer from a circular cylinder for parallel and contra flows, Frontiers in Mechanical Engineering, Vol. 3(2), (2017). doi: 10.3389/fmech.2017.00002.
Nepal C. Roy, S. Sultana, Effect of magnetic field on unsteady free convection flow over a vertical wavy surface, Dhaka University Journal of Science, Vol. 65(2), pp. 85–90 (2017).
S. Sultana, Nepal C. Roy, Natural convection flow of MHD micropolar fluid along a vertical wavy surface, Dhaka University Journal of Science, Vol. 65(2), pp. 91–96 (2017).
Nepal C. Roy, A. Husen, Skin friction and heat transfer in combined convection from a sphere to a non-Newtonian fluid, Dhaka University Journal of Science, Vol. 65(1), pp. 21–25 (2017).
M. A. Hossain, Nepal C. Roy, S. Siddiqa, Unsteady mixed convection dusty fluid flow past a vertical wedge due to small fluctuation in free stream and surface temperature, Applied Mathematics and Computation, Volume 293, pp. 480–492 (2017).
N. Chen, F. Wang, R. Hu, Nepal C. Roy, Md. A. Hossain, Transient flow of viscous compressible fluid past a heated cylinder, International Journal of Aerodynamics (IJAD), Vol. 5, No. 3/4, pp. 172–193 (2016).
Nepal C. Roy, R. S. R. Gorla, Unsteady mixed convection of a micropolar fluid past a circular cylinder due to time-dependent free stream velocity and temperature, Communications in Numerical Analysis, Volume 2016 (2), pp. 118–143 (2016). http://dx.doi.org/10.5899/2016/cna-00259.
Nepal C. Roy, R. S. R. Gorla, Unsteady mixed convection flow of a micropolar fluid about a sphere, Int. J. Heat Mass Transfer-Theory and Applications (IREHEAT), Vol. 3(3), pp. 54–66 (2015).
N. C. Roy, Md. A. Hossain, S. Hussain, Unsteady laminar mixed convection boundary layer flow near a vertical wedge due to oscillations in the free-stream and surface temperature, Int. J. of Applied Mechanics and Engineering, Vol. 21(1), pp. 169–186 (2016).
N. C. Roy, M. N. Firoza, A. K. Halder, Radiation effect on unsteady mixed convection boundary layer flow, heat and mass transfer over a wedge, Dhaka University Journal of Science, Vol. 64(1), pp. 59–64 (2016).
N. C. Roy, P. Akther, A. Halder, MHD mixed convection flow of a micropolar fluid past a wedge fixed in a fluctuating free stream and surface temperature, Dhaka University Journal of Science, Vol. 64(1), pp. 65–70 (2016).
Nepal C. Roy, Yuji Nakamura, Investigation of unsteady behaviors of forward and opposed flow combustion of solid fuel, Combustion and Flame, Vol. 163, pp. 517–531 (2016).
S. Hussain, Nepal C. Roy, Md. A. Hossain, S. C. Saha, Effect of fluctuating surface heat and mass flux on natural convection flow along a vertical flat plate, Mathematical Problems in Engineering, http://dx.doi.org/10.1155/2015/258016 (2015).
Nepal C. Roy, M.A. Hossain, R.S.R. Gorla, Unsteady free convection from a heated sphere in the presence of internal heat generation or absorption, International Journal of Thermal Sciences, Volume 98, pp. 237–244 (2015). https://doi.org/10.1016/j.ijthermalsci.2015.07.021
Litan K. Saha, Monotos C. Somadder, Nepal C. Roy, Hydro-magnetic mixed convection flow in a lid-driven cavity with wavy bottom surface, American Journal of Applied Mathematics, Vol. 3(3), pp. 8–19 (2015).
Nepal C. Roy, B. P. Ghosh, L. K. Saha, Unsteady MHD free convection flow along a vertical plate in the presence of radiative heat flux, Applied Mathematics, Vol. 4(3), pp. 77–85 (2014). doi:10.5923/j.am.20140403.02
Nepal C. Roy, Akter Hossain, Yuji Nakamura, A universal model of opposed flow combustion of solid fuel over an inert porous medium, Combustion and Flame, Vol. 161 (6), pp. 1645–1658 (2014).
Md. Mosharof Hossain, N. C. Roy, A. C. Mandal, M. A. Hossain, Transient natural convection flow of thermo-micropolar fluid of micropolar thermal conductivity along a non-uniformly heated vertical surface, Advances in Mechanical Engineering, Heat and Mass Transfer in Non-Newtonian Fluids, http://dx.doi.org/10.1155/2014/141437 (2014).
Md. M. Hossain, A. C. Mandal, N. C. Roy, and M. A. Hossain, Fluctuating Flow of Thermomicropolar Fluid Past a Vertical Surface, Applications and Applied Mathematics: An International Journal (AAM), Vol. 8(1), pp. 128–150 (2013).
Md. Mosharof Hossain, Nepal C. Roy, Md. Anwar Hossain, Boundary layer flow and heat transfer in a micropolar fluid past a permeable at plate, Theoretical and Applied Mechanics, Belgrade, Vol. 40(3), pp. 403–425 (2013).
N. C. Roy and B. P. Ghosh, Approximate Solution of a Differential Equation: The Essence of Perturbation, Jagannath University Journal of Science, Vol. 2(1), pp. 1–11 (2013).
N. C. Roy and Y. Nakamura, Modeling and asymptotic analysis of combustion of solid fuel deposited over an inert porous medium, Journal of Thermal Science and Technology, Vol. 7(4), pp. 723–739 (2012).
N. C. Roy and M. A. Hossain, The effect of conduction–radiation on the oscillating natural convection boundary layer flow of viscous incompressible fluid along a vertical plate, Proc. IMechE, Part C: Journal of Mechanical Engineering Science, Vol. 224, pp. 1959–1972 (2010).
Nepal C. Roy and M. A. Hossain, Numerical solution of a steady natural convection flow from a vertical plate with the combined effects of streamwise temperature and species concentration variations, Heat and Mass Transfer, Vol. 46, pp. 509–522 (2010).
Conference Papers
Nepal C. Roy, Free convective combustible boundary-layer flow along inclined hot surfaces with streamwise surface temperature variations, 20th Internationational Mathematics Conference 2017, 8-10 December, 2017, Department of Mathematics, University of Dhaka.
Sadia Masud, Nepal C. Roy, Effects of variable viscosity on natural convection of combustible gas mixture over an axisymmetric body, 20^{th} International Mathematics Conference 2017, 8-10 December, 2017, Department of Mathematics, University of Dhaka.
Nepal C. Roy and Md. A. Hossain, Flow and heat transfer characteristics in a channel with stenosis due to temperature dependent viscosity variations, International Conference on Advances in Computational Mathematics (ICACM 2017), 27-28 May, 2017, Department of Mathematics, University of Dhaka.
Nepal C. Roy and Yuji Nakamura, Asymptotic Analysis of Combustion of Soot Deposited Over an Inert Porous Media, Paper No. 11F-48, 2011 Fall Technical Meeting of the Western States Section of the Combustion Institute, 16-18 Oct., 2011, University of California, Riverside.
N. C. Roy and Y. Nakamura, Mathematical Modeling for the Regeneration of Diesel Particulate Filter (DPF), International Conference on EcoTopia Science’11, Dec. 9-11, 2011, Nagoya University, Nagoya, Japan.
N. C. Roy, The conjugate effects of streamwise surface temperature and species concentration on steady natural convection flow along a vertical plate, Fifteenth Mathematics Conference-2007, 29-31 Dec, Bangladesh Mathematical Society Department of Mathematics, University of Dhaka.
Poster Presentations
Salaika Parvin, Nepal C. Roy, Ignition of non-premixed mixture over a wedge, 20^{th} International Mathematics Conference 2017, 8-10 December, 2017, Department of Mathematics, University of Dhaka.
T. Rahman, N. C. Roy, Md. A. Hossain, Unsteady laminar boundary layer flow of viscous compressible fluid past a heated cylinder with viscous dissipation, 20^{th} International Mathematics Conference 2017, 8-10 December, 2017, Department of Mathematics, University of Dhaka. (Achieved best poster presentation award)
Lecturer, Daffodil International University, Bangladesh. From May 8, 2008 to September 20, 2009.
Lecturer, Department of Mathematics, University of Dhaka. From February 6, 2012 to June 7, 2014.
Assistant Professor, Department of Mathematics, University of Dhaka. From June 8, 2014 to March 21, 2018.
Associate Professor, Department of Mathematics, University of Dhaka. From March 22, 2018 to date.
Justice Ibrahim Memorial Gold Medal for outstanding teaching and research for the year 2018.
The A. F. Mujibur Rahman Foundation Gold Medal award for excellence in Mathematics in B.Sc., University of Dhaka, Bangladesh, 2003.
The A. F. Mujibur Rahman Foundation Gold Medal award for excellence in Mathematics in M.Sc., University of Dhaka, Bangladesh, 2004.
Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan scholarship for doctoral program from October 1, 2009 to January 31, 2012.
JASSO Honors Scholarship (Gakushu-shorei-hi) from October 1, 2013 to March 31, 2014.
Laminar boundary layer flow of Newtonian, non-Newtonian and reacting fluid; Heat and mass transfer in natural, forced and mixed convection; Radiative heat transfer; Thermo-micropolar fluid; Magnetohydrodynamic convective flow and Convective flow in porous media.
Natural, forced and mixed convection flow in an open-ended/closed enclosure and channels with regular and irregular geometry of Newtonian/non-Newtonian fluids.
Modeling and theoretical investigation of a practical problem; Asymptotic analysis.
Lecturer, Daffodil International University, Bangladesh. From May 8, 2008 to September 20, 2009.
Lecturer, Department of Mathematics, University of Dhaka. From February 6, 2012 to June 7, 2014.
Assistant Professor, Department of Mathematics, University of Dhaka. From June 8, 2014 to March 21, 2018.
Associate Professor, Department of Mathematics, University of Dhaka. From March 22, 2018 to date.