Tapan Sengupta
New book published:
High Accuracy Computing Methods: Fluid Flows and Wave Phenomena. Cambridge Univ. Press, USA (Julyl 2013)
Note: An Indian edition is available.
New book to be published:
Theoretical and Computational Aerodynamics. Wiley, UK (Launch in 2015)
Contains chapters on transonic aerodynamics, computational theoretical studies of NLF airfoil, low Reynolds number aerodynamics and active control of flow for high lift and low drag.
Supervisors: IUTAM symposium on HPC of transitional and turbulent flows (Organizing Chairman)
Phone: +91 512 2597945 (0ffice)
Address: High Performance Computing Laboratory
Dept. of Aerospace Engineering
IIT Kanpur, KANPUR 208 016, INDIA
High Accuracy Computing Methods: Fluid Flows and Wave Phenomena. Cambridge Univ. Press, USA (Julyl 2013)
Note: An Indian edition is available.
New book to be published:
Theoretical and Computational Aerodynamics. Wiley, UK (Launch in 2015)
Contains chapters on transonic aerodynamics, computational theoretical studies of NLF airfoil, low Reynolds number aerodynamics and active control of flow for high lift and low drag.
Supervisors: IUTAM symposium on HPC of transitional and turbulent flows (Organizing Chairman)
Phone: +91 512 2597945 (0ffice)
Address: High Performance Computing Laboratory
Dept. of Aerospace Engineering
IIT Kanpur, KANPUR 208 016, INDIA
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Books by Tapan Sengupta
*Correct error propagation analysis
*Practical compact schemes and global analysis tool
*Aliasing error and its alleviation
*Spurious upstream propagating q-waves
*Explanation of Gibbs phenomenon
*New 1D and 2D filters for LES/DNS without SGS modeling
*Anisotropic skewed wave propagation
*Development and analysis of dispersion relation preservation (DRP) schemes
*Flow instabilities and wave propagation phenomena
"More details to be posted in:
spectral.iitk.ac.in"
Papers by Tapan Sengupta
of jets reveal the presence of multiple dominant modes. The S- class displays the presence of upstream propagating disturbances. It is reasoned that due to limited streamwise extent of the domain, experiments and computations on round jets do not always correlate with the linear stability properties. For DNS, a new compact scheme (OUCS4), introduced in [6], along with RK4 time stepping is used. A new filtering procedure is advocated in the radial direction, which removes the numerical instability at the core (due to a mathematical singularity) and allows us to study receptivity of round jets to different classes of excitation.
time or as spatio-temporal structures. However, for boundary layers, it is customary to treat it as a
spatial problem and some limited comparison between prediction and laboratory experiments exist.
In the present work, the receptivity problem of a zero pressure gradient boundary layer excited by
a localized harmonic source is investigated under the general spatio-temporal framework, using the
Bromwich contour integral method. While this approach has been shown to be equivalent to the
spatial study, for unstable systems excited by a single frequency source T. K. Sengupta, M. Ballav,
and S. Nijhawan, Phys. Fluids 6, 1213 1994, here we additionally show, how the boundary layer
behaves when it is excited i at a single frequency that corresponds to a stable condition given by
spatial normal-mode analysis and ii by wideband frequencies, that shows the possibility of flow
transition due to a spatio-temporally growing forerunner or wave front. An energy based receptivity
analysis tool is also developed as an alternative to traditional instability theory. Using this, we
reinterpret the concept of critical layer that was originally postulated to explain the mathematical
singularity of inviscid disturbance field in traditional instability theory of normal modes.
*Correct error propagation analysis
*Practical compact schemes and global analysis tool
*Aliasing error and its alleviation
*Spurious upstream propagating q-waves
*Explanation of Gibbs phenomenon
*New 1D and 2D filters for LES/DNS without SGS modeling
*Anisotropic skewed wave propagation
*Development and analysis of dispersion relation preservation (DRP) schemes
*Flow instabilities and wave propagation phenomena
"More details to be posted in:
spectral.iitk.ac.in"
of jets reveal the presence of multiple dominant modes. The S- class displays the presence of upstream propagating disturbances. It is reasoned that due to limited streamwise extent of the domain, experiments and computations on round jets do not always correlate with the linear stability properties. For DNS, a new compact scheme (OUCS4), introduced in [6], along with RK4 time stepping is used. A new filtering procedure is advocated in the radial direction, which removes the numerical instability at the core (due to a mathematical singularity) and allows us to study receptivity of round jets to different classes of excitation.
time or as spatio-temporal structures. However, for boundary layers, it is customary to treat it as a
spatial problem and some limited comparison between prediction and laboratory experiments exist.
In the present work, the receptivity problem of a zero pressure gradient boundary layer excited by
a localized harmonic source is investigated under the general spatio-temporal framework, using the
Bromwich contour integral method. While this approach has been shown to be equivalent to the
spatial study, for unstable systems excited by a single frequency source T. K. Sengupta, M. Ballav,
and S. Nijhawan, Phys. Fluids 6, 1213 1994, here we additionally show, how the boundary layer
behaves when it is excited i at a single frequency that corresponds to a stable condition given by
spatial normal-mode analysis and ii by wideband frequencies, that shows the possibility of flow
transition due to a spatio-temporally growing forerunner or wave front. An energy based receptivity
analysis tool is also developed as an alternative to traditional instability theory. Using this, we
reinterpret the concept of critical layer that was originally postulated to explain the mathematical
singularity of inviscid disturbance field in traditional instability theory of normal modes.