U. D. Tiwari, N. S. Ghaisas, K. Mitra, "Evaluating the combined effect of turbine rotor yaw misalignment and wind farm column misalignment on wake losses in finite wind farm arrays using large eddy simulation", submitted, 2024.

K. Mondal, N. N. Kethavath, N. S. Ghaisas, "Large-eddy simulation study of the atmospheric boundary layer flow over smooth-to-rough surface roughness transitions", Boundary-Layer Meteorology, 191, 2025. https://doi.org/10.1007/s10546-025-00906-z 

N. N. Kethavath, N. S. Ghaisas, "Effect of an abrupt rough-to-smooth surface roughness transition occurring upstream or within a wind farm: an LES and analytical modelling study", Physics of Fluids, 37, 025130, 2025. https://doi.org/10.1063/5.0250111 

J. A. Patel, A. Maity, N. S. Ghaisas, "A Coupled Immersed Boundary Method and Wall Modelling Framework for High-Reynolds Number Flows over Complex Terrain", Computers and Fluids, 285, 106457, 2024. https://doi.org/10.1016/j.compfluid.2024.106457 

N. N. Kethavath, N. S. Ghaisas, "Effect of an abrupt rough-to-smooth surface roughness transition on wind farm wakes: An LES and analytical modelling study", Journal of Renewable and Sustainable Energy, 16, 033302, 2024. https://doi.org/10.1063/5.0202733 

P. Vishwaja, N. S. Ghaisas, "Evaluating Anisotropic Minimum Dissipation, Sigma and Modulated Gradient subgrid-scale models in large-eddy simulation of compressible mixing layers", Journal of Turbulence, 24, 654 - 685, 2023. https://doi.org/10.1080/14685248.2023.2297901

K. Mondal, N. N. Kethavath, K. Abhinay, N. S. Ghaisas, "Large Eddy Simulation Study of Atmospheric Boundary Layer Flow over an Abrupt Rough-To-Smooth Surface Roughness Transition", Boundary-Layer Meteorology, 188, 229 - 257, 2023. https://doi.org/10.1007/s10546-023-00811-3

N. N. Kethavath, K. Mondal, N. S. Ghaisas, "Large-eddy simulation and analytical modelling study of the wake of a wind turbine behind an abrupt rough-to-smooth surface roughness transition", Physics of Fluids, 34, 125117, 2022. https://doi.org/10.1063/5.0129022

N. S. Ghaisas, "A Predictive Analytical Model for the Surface Shear Stresses and Velocity Profiles Behind a Surface Roughness Jump", Boundary-Layer Meteorology, 176, 349 - 368, 2020. https://doi.org/10.1007/s10546-020-00535-8 

N. S. Ghaisas, A. S. Ghate, S. K. Lele, "Effect of tip spacing, thrust coefficient and turbine spacing in multi-rotor wind turbines and farms", Wind Energy Science, 5, 51 - 72, 2020. https://doi.org/10.5194/wes-5-51-2020 

N. S. Ghaisas, A. Subramaniam, S. K. Lele, “A unified high-order Eulerian method for continuum simulations of fluid flow and of elastic-plastic deformations in solids”, Journal of Computational Physics, 371, 452 - 482, 2018. https://doi.org/10.1016/j.jcp.2018.05.035 

A. Subramaniam, N. S. Ghaisas, S. K. Lele, “High-order Eulerian simulations of multi-material elastic-plastic flow”, Journal of Fluids Engineering, 140, 050904, 9 pages, 2018. https://doi.org/10.1115/1.4038399 

N. S. Ghaisas, C. L. Archer, S. Xie, S. Wu, E. Maguire, “Evaluation of layout and atmospheric stability effects in wind farms using large-eddy simulation”, Wind Energy, 20, 1227 – 1240, 2017. https://doi.org/10.1002/we.2091 

S. Xie, C. L. Archer, N. S. Ghaisas, C. Meneveau, “Benefits of collocating vertical-axis and horizontal-axis wind turbines in large wind farms”, Wind Energy, 20, 45 – 62, 2017. https://doi.org/10.1002/we.1990 

N. S. Ghaisas, S. H. Frankel, “Dynamic Gradient models for the subgrid scale stress tensor and scalar flux vector in large eddy simulation”, Journal of Turbulence, 17, 30-50, 2016. https://doi.org/10.1080/14685248.2015.1083106 

N. S. Ghaisas, C. L. Archer, “Geometry-based models for studying the effects of wind farm layout”, Journal of Atmospheric and Oceanic Technology, 33, 481-501, 2016. https://doi.org/10.1175/JTECH-D-14-00199.1 

S. Xie, N. S. Ghaisas, C. L. Archer, “Sensitivity issues in finite-difference large-eddy simulations of the atmospheric boundary layer”, Boundary-Layer Meteorology, 157, 421-445, 2015. https://doi.org/10.1007/s10546-015-0071-3 

N. S. Ghaisas, D. A. Shetty, S. H. Frankel, “Large eddy simulation of turbulent horizontal buoyant jets” Journal of Turbulence, 16, 772-808, 2015. https://doi.org/10.1080/14685248.2015.1008007 

A. Pal, K. Anupindi, Y. Delorme, N. S. Ghaisas, D. A. Shetty, S. H. Frankel, “Large eddy simulation of transitional flows in an idealized stenotic blood vessel: evaluation of subgrid scale models” Journal of Biomechanical Engineering, 136, 071009, 2014. https://doi.org/10.1115/1.4027610 

N. S. Ghaisas, S. H. Frankel, “A priori evaluation of large eddy simulation subgrid-scale scalar flux models in isotropic passive-scalar and anisotropic buoyancy-driven homogeneous turbulence” Journal of Turbulence, 15, 88-121, 2014. https://doi.org/10.1080/14685248.2013.875622 

N. S. Ghaisas, D. A. Shetty, S. H. Frankel, “Large eddy simulation of thermal driven cavity: Evaluation of sub-grid scale models and flow physics” International Journal of Heat and Mass Transfer, 56, 606-624, 2013. https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.055 

Vinod V., P. Vishwaja, N. S. Ghaisas, L. D. Chandrala, "Instabilities of a shock-generated vortex ring", 8th National Symposium on Shock Waves (NSSW 2024), IIT Kanpur, November 12 - 15, 2024.

Anagha K., J. J. Patel, R. Kumar, Gnanaprakash K., N. S. Ghaisas, S. K. Karthick, "Transonic study of sub-cavity within a complex cavity", 8th National Symposium on Shock Waves (NSSW 2024), IIT Kanpur, November 12 - 15, 2024.

N. N. Kethavath, N. S. Ghaisas, "Evaluation of Wind Farm Performance over Heterogeneously Rough Terrain using Large Eddy Simulation", The Science of Making Torque from Wind (TORQUE 2024), Florence, Italy, May 29 - 31, 2024.

J. A. Patel, A. Maity, N. S. Ghaisas, "The Influence of Topographical Variations on Wind Turbine Wake Characteristics Using LES", The Science of Making Torque from Wind (TORQUE 2024), Florence, Italy, May 29 - 31, 2024.

K. Mondal, N. N. Kethavath, N. S. Ghaisas, "Study of the Atmospheric Boundary Layer Flow over a Heterogeneous Surface with a Smooth-to-Rough Roughness Transition", 10th International and 50th National Conference on Fluid Mechanics and Fluid Power (FMFP2023-140), IIT Jodhpur, December 20 - 22, 2023. 

A. Sharma, N. N. Kethavath, N. S. Ghaisas, "Evaluation of a physics-based wind turbine wake growth rate model and a velocity deficit model using large eddy simulations", 10th International and 50th National Conference on Fluid Mechanics and Fluid Power (FMFP2023-338), IIT Jodhpur, December 20 - 22, 2023.

B. Lodh, N. S. Ghaisas, V. Dixit, K. RaghuVamshi, K. Gujrathi, "Flow structures and heat flux parameterizations in dry convective atmospheric boundary layers", 10th International and 50th National Conference on Fluid Mechanics and Fluid Power (FMFP2023-133), IIT Jodhpur, December 20 - 22, 2023.

A. Maity, J. Patel, N. S. Ghaisas, "Large Eddy Simulation of the Flow Over Two-Dimensional Smooth Hills with Increasing Slopes", 10th International and 50th National Conference on Fluid Mechanics and Fluid Power (FMFP2023-197), IIT Jodhpur, December 20 - 22, 2023.

P. Vishwaja, N. S. Ghaisas, "Assessment of subgrid-scale models and a shock-capturing scheme in large-eddy simulations of compressible turbulent mixing layers", 14th Asian CFD Conference (Paper No. 93), Bengaluru, October 30 - November 2, 2023.

U. D. Tiwari, N. S. Ghaisas, K. Mitra, "Studying the combined effect of yaw misalignment and wind flow direction on wind farm wake losses", 14th Asian CFD Conference (Paper No. 205), Bengaluru, October 30 - November 2, 2023.

A. Maity, J. A. Patel, N. S. Ghaisas, "A coupled immersed boundary and wall modelling framework for high-Reynolds number flows over complex terrain", 14th Asian CFD Conference (Paper No. 187), Bengaluru, October 30 - November 2, 2023.

N. N. Kethavath, K. Mondal, N. S. Ghaisas, "Effect of surface roughness heterogeneity on a wind farm evaluated using large eddy simulation", 14th Asian CFD Conference (Paper No. 86), Bengaluru, October 30 - November 2, 2023.

P. Vishwaja, N. S. Ghaisas, "Evaluation of a Shock-Capturing Scheme and a Subgrid-Scale Model in Large Eddy Simulation of Compressible Turbulent Mixing Layers", 9th International and 49th National Conference on Fluid Mechanics and Fluid Power (FMFP2022-3093), IIT Roorkee, December 14 - 16, 2022.

K. N. Naik, K. Mondal, N. S. Ghaisas, "Surface Roughness Heterogeneity Effects on a Five Turbine Wind Farm Evaluated Using Large Eddy Simulation", 9th International and 49th National Conference on Fluid Mechanics and Fluid Power (FMFP2022-8447), IIT Roorkee, December 14 - 16, 2022. 

K. Mondal, K. N. Naik, N. S. Ghaisas, "Large Eddy Simulation Study of the Boundary-Layer Flow Behind a Surface Roughness Jump", 1st International Conference in Fluid Thermal and Energy Systems (ICFTES2022-FF-148), NIT Calicut, June 9 - 11, 2022.

K. N. Naik, K. Mondal, N. S. Ghaisas, "Large Eddy Simulation Study of a Wind Turbine Sited Behind an Abrupt Surface Roughness Transition", 1st International Conference in Fluid Thermal and Energy Systems (ICFTES2022-ES-152), NIT Calicut, June 9 - 11, 2022.

N. S. Gaikwad, A. Maity, N. S. Ghaisas, "Implementation of a Ghost-Point Immersed Boundary Method in a High-Order Finite-Difference Large-Eddy Simulation Code", 48th National Conference on Fluid Mechanics and Fluid Power (FMFP2021-222), BITS Pilani, December 27 - 29, 2021.

K. Abhinay, K. N. Naik, K. Mondal, N. S. Ghaisas, "Sensitivity of Atmospheric Boundary Layer Statistics to LES Wall Shear Stress Models Behind a Surface Roughness Jump", 48th National Conference on Fluid Mechanics and Fluid Power (FMFP2021-108), BITS Pilani, December 27-29, 2021.

N. S. Ghaisas, B. Bollu, N. Dongari, "Regularized Geometry-Based Models for Power Prediction of Wind Farms", Proceedings of the 8th International and 47th National Conference on Fluid Mechanics and Fluid Power (FMFP2020-067), IIT Guwahati, December 9 - 11, 2020.

N. S. Ghaisas, "Effect of vertical domain size on wind-turbine large eddy simulations in a half-channel", 1st Online International Conference on Recent Advances in Computational and Experimental Mechanics, Paper ID FM-027, organized by IIT Kharagpur, September 4-6, 2020.

N. S. Ghaisas, A. S. Ghate, S. K. Lele, "Characterizing turbulence in multi-rotor wind turbine wakes using large eddy simulation", 11th International Symposium on Turbulence and Shear Flow Phenomena at Southampton, U.K., July 30-August 2, 2019.

N. S. Ghaisas, A. S. Ghate, S. K. Lele, “Large eddy simulation study of multi-rotor wind turbines”, 7th Biennial Conference on The Science of Making Torque from Wind (TORQUE) at Milano, Italy, June 20-22, 2018.

A. S. Ghate, N. S. Ghaisas, A. S. Towne, S. K. Lele, “Modeling small scale boundary layer turbulence distortion through an actuator disk using discrete Gabor modes”, 36th Wind Energy Symposium, AIAA SciTech Forum, at Kissimmee, FL, January 8-12, 2018.

N. S. Ghaisas, A. S. Ghate, S. K. Lele, “Farm efficiency of large wind farms: Evaluation using large-eddy simulation”, 10th International Symposium on Turbulence and Shear Flow Phenomena at Chicago, Il, July 6-9, 2017.

N. S. Ghaisas, A. Subramaniam, S. K. Lele, “High-order Eulerian methods for elastic-plastic flow in solids and coupling with fluid flows”, 46th Fluid Dynamics Conference at the AIAA Aviation Meeting at Washington, D. C., June 13-16, 2016.

N. S. Ghaisas, "High-fidelity large eddy simulation of atmospheric boundary layer turbulence", SCPP-IoE Workshop, IIT Bombay, November 14-15, 2024.

N. S. Ghaisas, "Incorporating effects of surface roughness heterogeneities in large eddy simulations of atmospheric boundary layer and wind farms", 59th R. Ananthakrishnan Colloquium, Indian Institute of Tropical Meteorology Pune, 12 April, 2024.

N. S. Ghaisas, "Large eddy simulations of wind farms on complex heterogeneous terrain", Mechanical Sciences Young Investigators' Meeting, IIT Kanpur, 8 - 10 March, 2024.

N. N. Kethavath, K. Mondal, N. S. Ghaisas, "Large eddy simulation study of an isolated wind turbine and wind farm behind an abrupt surface roughness jump", Wind Energy Science Conference, Glasgow, UK, 23 - 26 May, 2023.

U. D. Tiwari, N. S. Ghaisas, K. Mitra, "Studying the combined effects of yaw angle and wind direction in finite wind farm arrays using large eddy simulations", Wind Energy Science Conference, Glasgow, UK, 23 - 26 May, 2023.

K. Mondal, J. A. Patel, N. N. Kethavath, N. S. Ghaisas, "Numerical studies of wind turbine and wind farm wakes on uneven terrain", Converge User Conference, Pune, February 13 - 16, 2023.

K. N. Naik, K. Mondal, N. S. Ghaisas, "Large Eddy Simulation and Analytical Model Development for the Wind Turbine Wake Evolution Behind a Surface Roughness Jump", ME@75 Research Frontiers Conference, IISc Bangalore, June 29 - July 1, 2022.

N. S. Ghaisas, "Enabling better wind farm layout optimization studies using large eddy simulations", Keynote talk at SPARC Virtual Workshop on Multi-Objective Optimization Under Uncertainty, organized by IIT Hyderabad and University of Exeter, UK, September 1 - 3, 2021.

N. S. Ghaisas, "High-Fidelity Large Eddy Simulations for Wind Energy Research: Wind-Turbine and Boundary-Layer Flows over Heterogeneous Surfaces", Invited Talk in 22nd Annual CFD Symposium of the Aeronautical Society of India (AeSI), August 11, 2021.

N. S. Ghaisas, "A Scalable High-Order Code Large Eddy Simulation Code for Wind Energy Applications", NSM Workshop on High Performance Computing in Computational Fluid Dynamics (HPCCFD), organized by IIT Madras, December 1 - 3, 2020.

N. S. Ghaisas, A. S. Ghate, S. K. Lele, "A Scalable Hybrid Fourier-Compact Finite-Difference Large Eddy Simulation Code for Wind Energy Applications", Invited Talk in Mini-symposium on Advances in Computational Sciences and Parallel Computing, at International Conference on Advances in Differential Equations and Numerical Analysis (ADENA), October 12 - 15, 2020.

A. Subramaniam, N. S. Ghaisas, S. K. Lele, “A continuum treatment of sliding in Eulerian simulations of solid-solid and solid-fluid interfaces”, 70th Annual meeting of the APS Division of Fluid Dynamics, at Denver, CO, November 19-21, 2017.

A. S. Ghate, N. S. Ghaisas, S. K. Lele, “Modeling distortion of HIT by an Actuator Disk in a periodic domain”, 70th Annual meeting of the APS Division of Fluid Dynamics, at Denver, CO, November 19-21, 2017.

N. S. Ghaisas, A. S. Ghate, Sanjiva K. Lele, “Modeling and simulation of vertically-staggered multi-rotor wind farms”, Thermal and Fluid Sciences Industrial Affiliates and Sponsors Conference, at Stanford University, Stanford, CA, February 1-3, 2017.

A. Subramaniam, N. S. Ghaisas, Sanjiva K. Lele, “Richtmyer-Meshkov flow of elastic-plastic solids using a high-order Eulerian framework”, 69th Annual meeting of the APS Division of Fluid Dynamics, Volume 61, Number 20 at Portland, OR, November 20-22, 2016.

N. S. Ghaisas, A. Subramaniam, Sanjiva K. Lele, “Unified treatment of shocks and material interfaces in hyperelastic solids and fluids”, XXIV International Conference of Theoretical and Applied Mechanics, at Montreal, Canada, August 21-26, 2016.

A. Subramaniam, N. S. Ghaisas, Sanjiva K. Lele, “Progress in Eulerian simulations of multi-material elastic-plastic flow”, 15th International Workshop on the Physics of Compressible Turbulent Mixing, at Sydney, Australia, July 11-15, 2016.

N. S. Ghaisas, “Large-eddy simulation study of combined configuration and stability effects in wind farms and development of geometry-based models for layout evaluation”, CTR Tea Seminar, Center for Turbulence Research, Stanford, CA, May 20, 2016.

N. S. Ghaisas, A. Subramaniam, Sanjiva K. Lele, “Simulation of flows involving elastic/plastic deformation of interfaces”, Thermal and Fluid Sciences Industrial Affiliates and Sponsors Conference, at Stanford University, Stanford, CA, February 3-5, 2016.

V. Kulkarni, A. Ardekani, N. S. Ghaisas, S. Snyder, P. E. Sojka, “Drop deformation of viscoelastic drops in the presence of a continuous air stream in the bag breakup regime”, 87th Annual Meeting of the Society of Rheology, at Baltimore, MD, October 11-15, 2015.

S. Xie, N. S. Ghaisas, C. L. Archer, C. Meneveau, “Simulations of multi-scale wind turbines in a vertically staggered wind farm”, International Conference on Model Integration across Disparate Scales in Complex Turbulent Flow Simulation, at State College, PA, June 15-17, 2015.

C. L. Archer, N. S. Ghaisas, “Optimizing wind farm layout via LES-calibrated geometric models inclusive of wind direction and atmospheric stability effects”, European Geosciences Union General Assembly, at Vienna, Austria, April 12-17, 2015.

C. L. Archer, S. Xie, N. S. Ghaisas, “Improved understanding of atmospheric stability effects on wind farm performance using large-eddy simulation”, 2015 SIAM Conference on Computational Science and Engineering, at Salt Lake City, UT, March 14-18, 2015.

N. S. Ghaisas, C. L. Archer, “A geometry-based approach for optimizing wind turbine layout” 67th Annual meeting of the APS Division of Fluid Dynamics, Volume 59, Number 20 at San Francisco, CA, November 23-25, 2014.

N. S. Ghaisas, S. H. Frankel, “Large eddy simulation of buoyancy induced asymmetry in horizontal jets” 66th Annual meeting of the APS Division of Fluid Dynamics, Volume 58, Number 18 at Pittsburgh, PA, November 24-26, 2013.

N. S. Ghaisas, D. A. Shetty, S. H. Frankel, “Large eddy simulation study of mixing in stratified jets” 65th Annual meeting of the APS Division of Fluid Dynamics, Volume 57, Number 17 at San Diego, CA, November 18-20, 2012.

K. Anupindi, S. H. Frankel, N. S. Ghaisas, Y. Delorme, D. A. Shetty, “Large eddy simulation of thoracic and abdominal aortic aneurysms”, 32nd Israeli Conference on Mechanical Engineering, Tel-Aviv, Israel, October 17-18, 2012.

N. S. Ghaisas, D. A. Shetty, S. H. Frankel, “Formation number of particle-laden starting jets” 64th Annual meeting of the APS Division of Fluid Dynamics, Volume 56, Number 18 at Baltimore, MD, November 20-22, 2011.

N. S. Ghaisas, K. R. Sreenivas, J. Srinivasan, “Stability of double-diffusive finger convection in a non-linear time varying background state” Colloquium at Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore, July 2008.

N. S. Ghaisas, N. N. Kethavath, J. Patel, K. Mondal, “Wake Models”, Chapter 4 in Optimization, Uncertainty and Machine Learning in Wind Energy Conversion Systems edited by Prof. K Mitra and Prof. R. Everson, Springer, 2024. ISBN: 978-981-97-7909-3

U. D. Tiwari, N. S. Ghaisas, K. Mitra, “Understanding Wind Farm Performance Factors: SOWFA Solver Mechanics and Yaw Misalignment Case Study”, Chapter 5 in Optimization, Uncertainty and Machine Learning in Wind Energy Conversion Systems edited by Prof. K Mitra and Prof. R. Everson, Springer, 2024. ISBN: 978-981-97-7909-3

N. S. Ghaisas, A. Subramaniam, S. K. Lele, A. W. Cook, “Evaluation of an Eulerian multi-material mixture formulation based on a single inverse deformation gradient tensor field”, Annual Research Briefs, Center for Turbulence Research, 377 – 390, 2017.

A. Subramaniam, N. S. Ghaisas, S. K. Lele, “A continuum treatment of sliding in Eulerian simulations of solid-solid and solid-fluid interfaces”, Annual Research Briefs, Center for Turbulence Research, 363 – 376, 2017.

N. S. Ghaisas, A. Subramaniam, S. K. Lele, “Multi-material diffuse-interface Eulerian formulation for high-order simulations of elastic-plastic flow in solids”, Annual Research Briefs, Center for Turbulence Research, 303 – 315, 2016.

N. S. Ghaisas, A. Subramaniam, S. K. Lele, “High-order Eulerian methods for elastic-plastic flow in solids and coupling with fluid flows”, Annual Research Briefs, Center for Turbulence Research, 237 – 249, 2015.