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Article

Horner, Colby Niles and Sescu, Adrian and Afsar, Mohammed and Collins, Eric (2021) Numerical investigation of a rectangular jet exhausting over a flat plate with periodic surface deformations at the trailing edge. Aerospace, 8 (11). 314. ISSN 2226-4310

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed and Hattori, Yuji (2021) Investigation of Görtler vortices in high-speed boundary layers via an efficient numerical solution to the non-linear boundary region equations. Theoretical and Computational Fluid Dynamics. ISSN 1432-2250

Stirrat, Sarah and Afsar, Mohammed Z. and Minisci, Edmondo (2021) Assessment of optimization methods for aeroacoustic prediction of trailing-edge interaction noise in axisymmetric jets. Mathematics, 9 (9). 998.

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed Z. and Buxton, Oliver R. H. (2020) Investigation of wakes generated by fractal plates in the compressible flow regime using large-eddy simulations (LES). Physics of Fluids, 32 (10). 105106. ISSN 1089-7666

Goldstein, M. E. and Leib, S. J. and Afsar, M. Z. (2019) Rapid distortion theory on transversely sheared mean flows of arbitrary cross section. Journal of Fluid Mechanics, 881. pp. 551-584. ISSN 0022-1120

Karabasov, Sergey and Ayton, Lorna and Wu, Xuesong and Afsar, Mohammed (2019) Advances in aeroacoustics research : recent developments and perspectives. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 377 (2159). pp. 1-4. ISSN 1471-2962

Afsar, Mohammed Z. and Sescu, Adrian and Leib, Stewart J. (2019) Modelling and prediction of the peak-radiated sound in subsonic axisymmetric air jets using acoustic analogy-based asymptotic analysis. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 377 (2159). 20190073. ISSN 1471-2962

Afsar, M. Z. and Sescu, A. and Sassanis, V. (2019) Effect of non-parallel mean flow on the acoustic spectrum of heated supersonic jets : explanation of 'jet quietening'. Physics of Fluids B. ISSN 2163-503X

Goldstein, M. E. and Leib, S. J. and Afsar, M. Z. (2019) Sound generation due to the interaction of turbulence with surfaces embedded in transversely sheared flow. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 377 (2159). 20190076. ISSN 1471-2962

Sescu, Adrian and Al-aziz, Radwa and Afsar, Mohammed (2019) Effect of wall transpiration and heat transfer on Görtler vortices in high-speed flows. AIAA Journal, 57 (3). pp. 1159-1171. ISSN 0001-1452

Sescu, Adrian and Afsar, Mohammed (2018) Hampering Görtler vortices via optimal control in the framework of nonlinear boundary region equations. Journal of Fluid Mechanics, 848. pp. 5-41. ISSN 0022-1120

Goldstein, M. E. and Leib, S. J. and Afsar, M. Z. (2017) Generalized rapid-distortion theory on transversely sheared mean flows with physically realizable upstream boundary conditions : application to trailing edge problem. Journal of Fluid Mechanics, 824. pp. 477-512. ISSN 0022-1120

Sescu, Adrian and Taoudi, Lamaie and Afsar, Mohammed (2017) Iterative control of Görtler vortices via local wall deformations. Theoretical and Computational Fluid Dynamics. pp. 1-10. ISSN 1432-2250

Afsar, Mohammed and Leib, Stewart and Bozak, Richard (2017) Effect of de-correlating turbulence on the low frequency decay of jet-surface interaction noise in sub-sonic unheated air jets using a CFD-based approach. Journal of Sound and Vibration, 386. 177–207. ISSN 0022-460X

Book Section

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed Z. and Hattori, Yuji and Hirota, Makoto; (2021) A compressible boundary layer optimal control approach using nonlinear boundary region equations. In: AIAA Aviation 2021 Forum. AIAA, USA. ISBN 9781624106101

Afsar, M. Z. and Gryazev, V. and Markesteijn, A. and Karabasov, S.; (2021) Effect of tensor representations for high-order turbulence correlations in complex axi-symmetric flow fields. In: AIAA Aviation 2021 Forum. AIAA, USA. ISBN 9781624106101

Es Sahli, Omar and Sescu, Adrian and Afsar, Mohammed Z. and Hattori, Yuji and Hirota, Makoto; (2021) Effect of localized wall cooling or heating on streaks in high-speed boundary layers. In: AIAA Scitech 2021 Forum. AIAA, Virtual, Online.

Afsar, Mohammed Z.; (2019) Improved trailing edge noise prediction using a generalized Rapid-distortion theory approach. In: 25th AIAA/CEAS Aeroacoustics Conference. AIAA, NLD. ISBN 9781624105883

Afsar, Mohammed Z. and Sescu, Adrian and Minisci, Edmondo; (2019) Modeling supersonic heated jet noise at fixed jet Mach number using an asymptotic approach for the acoustic analogy Green’s function and an optimized turbulence model. In: 25th AIAA/CEAS Aeroacoustics Conference. AIAA, NLD. ISBN 9781624105883

Afsar, M. Z. and Sescu, A. and Sassanis, V. and Towne, A. and Brès, G. A. and Lele, S. K.; (2016) Prediction of supersonic jet noise using non-parallel flow asymptotics and LES data within Goldstein’s acoustic analogy. In: Studying Turbulence using Numerical Simulation Databases - XVI. Stanford University, Center for Turbulence Research, Stanford, California.

Conference or Workshop Item

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed Z. and Hattori, Yuji and Hirota, Makoto (2021) Control of Görtler vortices in high-speed boundary layer flows using nonlinear boundary region equations. In: Eighteenth International Conference on Flow Dynamics, 2021-10-27 - 2021-10-29, Virtual Event.

Horner, Colby and Sescu, Adrian and Afsar, Mohammed Z. and Collins, Eric (2021) Effect of plate trailing edge deformations on jet flow and noise : an LES investigation. In: Eighteenth International Conference on Flow Dynamics, 2021-10-27 - 2021-10-29, Virtual Event.

Afsar, Mohammed and Kokkinakis, Ioannis and Stirrat, Sarah (2020) Modeling and simulation of non-homogeneous turbulence subjected to sudden distortion with finite upstream mean flow shear. In: 73rd Annual Meeting of the APS Division of Fluid Dynamics, 2020-11-22 - 2020-11-24, Online Event.

Kholdoenko, Danila and Afsar, Mohammed and Muhel, Rohella and Kokkinakis, Ioannis (2020) Assessment of the Coanda Effect in 2D and 3D CFD simulations of installed rectangular jets. In: 73rd Annual Meeting of the APS Division of Fluid Dynamics, 2020-11-22 - 2020-11-24, Online Event.

Sescu, Adrian and Es-Sahli, Omar and Afsar, Mohammed and Hattori, Yuji and Hirota, Makoto (2020) Effect of wall cooling or heating on streaks and streamwise vortices developing in compressible boundary layers. In: 73rd Annual Meeting of the APS Division of Fluid Dynamics, 2020-11-22 - 2020-11-24, Online Event.

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed and Hattori, Yuji and Hirota, Makoto (2020) Investigation of an optimal control approach in the context of compressible boundary region equations. In: 73rd Annual Meeting of the APS Division of Fluid Dynamics, 2020-11-22 - 2020-11-24, Online Event.

Stirrat, Sarah and Afsar, Mohammed and Minisci, Edmondo and Kokkinakis, Ioannis (2020) Modelling the trailing edge noise using optimisation techniques within a rapid distortion theory framework. In: 73rd Annual Meeting of the APS Division of Fluid Dynamics, 2020-11-22 - 2020-11-24, Online Event.

Horner, Colby and Sescu, Adrian and Afsar, Mohammed and Collins, Eric (2020) Numerical investigation of the effect of trailing edge deformations on noise from jets exhausting over flat plates. In: 73rd Annual Meeting of the APS Division of Fluid Dynamics, 2020-11-22 - 2020-11-24, Online Event.

Sescu, Adrian and Afsar, Mohammed Z. and Bushan, Shanti and Hattori, Yuji and Hirota, Makoto (2020) Active control of high-speed boundary layer flows. In: Seventeenth International Conference on Flow Dynamics, 2020-10-28 - 2020-10-30, Virtual Conference and Tohoku University.

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed Z. and Hattori, Yuji and Hirota, Makoto (2020) Control of streamwise vortices developing in compressible boundary layers. In: Seventeenth International Conference on Flow Dynamics, 2020-10-28 - 2020-10-30, Virtual Conference and Tohoku University.

Afsar, Mohammed and Kokkinakis, Ioannis and Stirrat, Sarah (2020) Large-Eddy simulation of non-homogeneous turbulence subjected to sudden distortion. In: Seventeenth International Conference on Flow Dynamics, 2020-10-28 - 2020-10-30, Virtual Conference and Tohoku University.

Stirrat, Sarah and Afsar, Mohammed and Minisci, Edmondo and Kokkinakis, Ioannis (2020) Using optimisation techniques within a rapid-distortion theory framework to improve trailing edge noise predictions. In: Seventeenth International Conference on Flow Dynamics, 2020-10-28 - 2020-10-30, Virtual Conference and Tohoku University.

Afsar, M. Z. and Sescu, A. and Gryazev, V. and Markesteijn, A. and Karabasov, S. (2020) Analysis of the non-parallel flow-based Green's function in the acoustic analogy for complex axisymmetric jets. In: 2020 AIAA Aviation and Aeronautics Forum and Exposition, 2020-06-15 - 2020-06-19, Virtual Event.

Afsar, M. Z. and Gryazev, V. and Markesteijn, A. and Karabasov, S. (2020) Effect of large-scale mixing on the axisymmetric structure of turbulence correlations in complex dual stream jets. In: 2020 AIAA Aviation and Aeronautics Forum and Exposition, 2020-06-15 - 2020-06-19, Virtual Event.

Afsar, M. Z. and Sescu, A. and Leib, S. J. (2020) Improved jet noise predictions in subsonic flows using an approximate composite asymptotic expansion of the adjoint Green's function in Goldstein's analogy. In: 2020 AIAA Aviation and Aeronautics Forum and Exposition, 2020-06-15 - 2020-06-19, Virtual Event.

Afsar, M. Z. and Stirrat, S. A. and Kokkinakis, I. W. (2020) Investigation of fast GPU-based algorithms for jet-surface interaction noise calculations. In: 2020 AIAA Aviation and Aeronautics Forum and Exposition, 2020-06-15 - 2020-06-19, Virtual Event.

Horner, Colby and Sescu, Adrian and Afsar, Mohammed and Collins, Eric and Azarpeyvand, Mahdi (2020) Passive noise control strategies for jets exhausting over flat surfaces : an LES study. In: 2020 AIAA Aviation and Aeronautics Forum and Exposition, 2020-06-15 - 2020-06-19, Virtual Event.

Afsar, M. Z. (2020) The relationship between the surface pressure spectrum and transverse velocity spectrum in a Rapid-distortion theory model of trailing edge noise. In: 2020 AIAA Aviation and Aeronautics Forum and Exposition, 2020-06-15 - 2020-06-19, Virtual Event.

Meaden, Katherine and Afsar, Mohammed and Muhel, Rohella and Kokkinakis, Ioannis (2020) The Coanda Effect anomaly present in 2D CFD simulations of installed rectangular jets. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Kelly, Simon and Afsar, Mohammed and Muhel, Rohella and Kokkinakis, Ioannis (2020) How a jet flow interacting with a streamwise/spanwise corrugated surface causes an increase in turbulence kinetic energy. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Greenlee, George and Afsar, Mohammed and Muhel, Rohella (2020) Investigating incipient separation for an aerofoil at an arbitrary orientation subjected to on oncoming gust. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Johnston, D and Afsar, M (2020) Investigating the effectiveness of Padé-type approximations. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Stirrat, S.A. and Afsar, M.Z. and Kokkinakis, I.W. (2020) Investigation of parallel computing for jet-surface interaction noise calculations. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Mackay, Magnus and Afsar, Mohammed and Kokkinakis, Ioannis (2020) An LES investigation of the 2D Tollmien-Schlichting wave instability in channel flow. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Afsar, Mohammed and Stirrat, Sarah and McLeod, Lydia (2020) Structure of turbulence prior to rapid-distortion. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Knight, Megan and Muhel, Rohella and Afsar, Mohammed and Kokkinakis, Ioannis (2020) Turbulence kinetic energy for an axisymmetric steam jet. In: 33rd Scottish Fluid Mechanics Meeting, 2020-05-28 - 2020-05-28, Heriot Watt University.

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed (2020) Nonlinear centrifugal instabilities in curved free shear layers. In: American Institute of Aeronautics and Astronautics (AIAA) SciTech Forum, 2020-01-06 - 2020-01-10, Hyatt Regency Orlando.

Sescu, Adrian and Afsar, Mohammed and Hattori, Yuji (2020) Streaks in high-speed boundary layers : assessment via the full nonlinear boundary-region equations. In: American Institute of Aeronautics and Astronautics (AIAA) SciTech Forum, 2020-01-06 - 2020-01-10, Hyatt Regency Orlando.

Sescu, Adrian and Afsar, Mohammed and Hattori, Yuji (2019) Streak growth in high-speed boundary layers : assessment through the compressible boundary region equations. In: Sixteenth International Conference on Flow Dynamics, 2019-11-06 - 2019-11-08, Tohoku University.

Afsar, Mohammed (2019) Improved predictions of trailing-edge noise using rapid-distortion theory and CFD data. In: Sixteenth International Conference on Flow Dynamics, 2019-11-06 - 2019-11-08, Tohoku University.

Afsar, Mohammed (2019) A general approach to modeling jet-turbulence interaction problems using rapid-distortion theory. In: Sixteenth International Conference on Flow Dynamics, 2019-11-06 - 2019-11-08, Tohoku University.

Stirrat, Sarah and Afsar, Mohammed (2019) Structure of high frequency Green's function in non-axi-symmetric (chevron-type) transversely sheared mean flows using a Ray tracing solver within the generalized acoustic analogy formulation. In: The 32nd Scottish Fluid Mechanics Meeting, 2019-05-30 - 2019-05-30, University of Dundee, School of Science and Engineering.

Johnston, Daniel and Afsar, Mohammed (2019) Use of the Padé Approximant in solution to a model of vortex shedding. In: The 32nd Scottish Fluid Mechanics Meeting, 2019-05-30 - 2019-05-30, University of Dundee, School of Science and Engineering.

Sescu, Adrian and El-Amrani, Safae and Afsar, Mohammed Z (2018) Effect of wall temperature on the growth of Gortler vortices in high-speed boundary layers. In: 71st Annual Meeting of the APS Division of Fluid Dynamics, 2018-11-18 - 2018-11-21, Georgia World Congress Center.

Es-Sahli, Omar and Sescu, Adrian and Afsar, Mohammed Z and Buxton, Oliver (2018) Simulating and investigating compressible flows interaction with fractal structures. In: 71st Annual Meeting of the APS Division of Fluid Dynamics, 2018-11-18 - 2018-11-21, Georgia World Congress Center.

Sescu, Adrian and Afsar, Mohammed (2018) Optimal control of Gӧrtler vortices in a high-Reynolds number asymptotics framework. In: Fifteenth International Conference on Flow Dynamics, 2018-11-07 - 2018-11-09, Aobayama.

Leib, Stewart and Goldstein, Marvin and Afsar, Mohammed (2018) Application of rapid distortion theory to the prediction of integrated propulsion system noise. In: Acoustics and Urban Air Mobility Technical Working Group Meetings, 2018-10-16 - 2018-10-17, NASA Glenn Research Center.

Sescu, Adrian and Afsar, Mohammed (2017) Optimal control of Gortler vortices by means of local wall deformations. In: The 70th Annual Meeting of the American Physical Society Division of Fluid Dynamics, 2017-11-19 - 2017-11-21, Colorado Convention Center.

Sassanis, Vasilis and Afsar, Mohammed and Sescu, Adrian and Lele, Sanjiva (2017) On the existence of an overlap region between the Green’s function for a locally parallel axi-symmetric jet and the leading order non-parallel flow solution. In: The 70th Annual Meeting of the American Physical Society Division of Fluid Dynamics, 2017-11-19 - 2017-11-21, Colorado Convention Center.

Afsar, Mohammed and Sassanis, Vasilis (2017) Sound radiated by the interaction of non-homogeneous turbulence on a transversely sheared flow with leading and trailing edges of semi-infinite flat plate. In: The 70th Annual Meeting of the American Physical Society Division of Fluid Dynamics, 2017-11-19 - 2017-11-21, Colorado Convention Center.

Afsar, M. Z. and Sescu, A. and Sassanis, V. and Lele, S. K. (2017) Towards the prediction of supersonic jet noise predictions using a unified asymptotic approximation for the adjoint vector Green's function. In: 23rd AIAA/CEAS Aeroacoustics Conference, 2017-06-05 - 2017-06-09.