All Stories

  1. Case Studies in Modeling Cruise-Generated Trailing Vortices

    Article • Journal of Aircraft, November 2025, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  2. Case Studies in Modelling Cruise-Generated Trailing Vortices

    Article • July 2024, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  3. Towards a Simulation System for Virtual Flight - Dynamic High-Order Overset Grids Method

    Article • January 2024, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  4. Estimating Aircraft Landing Weights from Mode S Data

    Article • Journal of Aircraft, February 2023, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  5. Mitigating Wake Turbulence Risk During Final Approach via Plate Lines

    Article • AIAA Journal, August 2021, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  6. Mitigating Wake Turbulence Risk During Final Approach Via Plate Lines

    Article • June 2020, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel, Christian Schiefer, Clemens Weiß, Grigory Rotshteyn

  7. How Plate Lines Influence the Hazard Perception of Pilots During Wake Encounters

    Article • Journal of Aircraft, March 2020, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  8. Towards Virtual Flight in Realistic Environments: A Hybrid Coupled Simulation Method

    Article • AIAA Journal, March 2020, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  9. Wake Turbulence Evolution and Hazard Analysis for General Aviation Takeoff Accident

    Article • Journal of Aircraft, September 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  10. Assessment of dynamic pairwise separation benefits using an Airport-in-a-Lab concept

    Article • June 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  11. Assessment of Dynamic Pairwise Wake Vortex Separations for Approach and Landing at Vienna Airport

    Article • June 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  12. Assessment of the Wake-Vortex Proximity to Landing Aircraft Exploiting Field Measurements

    Article • Journal of Aircraft, May 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  13. Effects of Detailed Aircraft Geometry on Wake Vortex Dynamics During Landing

    Article • Journal of Aircraft, May 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  14. Probabilistic Multimodel Ensemble Wake-Vortex Prediction Employing Bayesian Model Averaging

    Article • Journal of Aircraft, January 2019, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  15. A review of recent wake vortex research for increasing airport capacity

    Article • Progress in Aerospace Sciences, April 2018, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  16. Computational Investigation of Varying Plate-Line Geometry and Placement on Wake Vortex Dissipation

    Article • Journal of Aircraft, January 2018, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  17. Analysis of potential wake vortex encounters at a major European airport

    Article • Aircraft Engineering, September 2017, Emerald

    Dr.-Ing. habil. Frank Holzäpfel

  18. The effect of gusts on aircraft wake vortices

    Article • Aircraft Engineering, September 2017, Emerald

    Dr.-Ing. habil. Frank Holzäpfel

  19. Multimodel Ensemble Methods for Prediction of Wake-Vortex Transport and Decay

    Article • Journal of Aircraft, September 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  20. Simulation Study of Severity and Mitigation of Wake-Vortex Encounters in Ground Proximity

    Article • Journal of Aircraft, September 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  21. Numerical Optimization of Plate-Line Design for Enhanced Wake-Vortex Decay

    Article • Journal of Aircraft, May 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel, Jürgen Schrall

  22. LES study on the shape effect of ground obstacles on wake vortex dissipation

    Article • Aerospace Science and Technology, January 2017, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  23. Performance of Onboard Wake–Vortex Prediction Systems Employing Various Meteorological Data Sources

    Article • Journal of Aircraft, September 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  24. Effect of Ground Obstacle Separation Distance on Wake Vortex Dissipation

    Article • June 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  25. Multi-Model Ensemble Wake Vortex Prediction - Further Development and Probabilistic Assessment (Invited)

    Article • June 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  26. Numerical Optimization of Plate Lines Design for Enhanced Wake Vortex Decay (Invited)

    Article • June 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  27. Effect of Ground Obstacle of Different Aspect Ratio on Wake Vortex Dissipation (Invited)

    Article • June 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  28. Wind Impact on Single Vortices and Counterrotating Vortex Pairs in Ground Proximity

    Article • Flow Turbulence and Combustion, April 2016, Springer Science + Business Media

    Dr.-Ing. habil. Frank Holzäpfel

  29. Enhanced wake vortex decay in ground proximity triggered by plate lines

    Article • Aircraft Engineering, March 2016, Emerald

    Dr.-Ing. habil. Frank Holzäpfel

  30. Multi-model ensemble wake vortex prediction

    Article • Aircraft Engineering, March 2016, Emerald

    Dr.-Ing. habil. Frank Holzäpfel

  31. Wake evolution from roll-up to vortex decay

    Article • AIAA Journal, September 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Takashi Misaka, Dr.-Ing. habil. Frank Holzäpfel

  32. Method of radial velocities for the estimation of aircraft wake vortex parameters from data measured by coherent Doppler lidar

    Article • Optics Express, August 2015, Optical Society of America (OSA)

    Dr.-Ing. habil. Frank Holzäpfel

  33. Sensitivity Analysis of Wake Vortex Parameters Measured by Doppler Lidar

    Article • June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Takashi Misaka, Dr.-Ing. habil. Frank Holzäpfel, Prof. Shigeru Obayashi

  34. Multi-Model Ensemble Wake Vortex Prediction (Invited)

    Article • June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  35. Wind Impact on Single Vortices and Counter-Rotating Vortex Pairs in Ground Proximity (Invited)

    Article • June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  36. Hybrid simulation of wake-vortex evolution during landing on flat terrain and with plate line

    Article • International Journal of Heat and Fluid Flow, October 2014, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  37. Effects of Environmental and Aircraft Parameters on Wake Vortex Behavior

    Article • Journal of Aircraft, September 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  38. Topological Approach to Multisensory Realization of Wake Turbulence

    Article • June 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Takashi Misaka, Dr.-Ing. habil. Frank Holzäpfel

  39. Impact of Wind and Obstacles on Wake Vortex Evolution in Ground Proximity

    Article • June 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Takashi Misaka, Dr.-Ing. habil. Frank Holzäpfel

  40. Wake Vortex Evolution During Approach and Landing With and Without Plate Lines

    Article • January 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Takashi Misaka, Dr.-Ing. habil. Frank Holzäpfel

  41. Numerical Simulation of Jet-Wake Vortex Interaction

    Article • January 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Takashi Misaka, Dr.-Ing. habil. Frank Holzäpfel, Prof. Shigeru Obayashi

  42. Enhancement of aircraft wake vortex decay in ground proximity

    Article • CEAS Aeronautical Journal, November 2013, Springer Science + Business Media

    Dr.-Ing. habil. Frank Holzäpfel

  43. Aircraft Wake-Vortex Decay in Ground Proximity—Physical Mechanisms and Artificial Enhancement

    Article • Journal of Aircraft, July 2013, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  44. Wake Evolution of High-Lift Configuration from Roll-Up to Vortex Decay

    Article • January 2013, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  45. Sensitivity Analysis of the Effects of Aircraft and Environmental Parameters on Aircraft Wake Vortex Trajectories and Lifetimes

    Article • January 2013, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  46. Aircraft Wake Vortex Decay in Ground Proximity - Physical Mechanisms and Artificial Enhancement

    Article • June 2012, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  47. Vortex bursting and tracer transport of a counter-rotating vortex pair

    Article • Physics of Fluids, February 2012, American Institute of Physics

    Dr.-Ing. habil. Frank Holzäpfel

  48. Wake Evolution of Wing-Body Configuration from Roll-Up to Vortex Decay

    Article • January 2012, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  49. Aircraft Wake Vortices: From Fundamental Research to Operational Application

    Article • January 2012, Springer Science + Business Media

    Dr.-Ing. habil. Frank Holzäpfel

  50. Wake Vortex Encounter Risk Assessment for Crosswind Departures

    Article • Journal of Aircraft, January 2012, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  51. Prediction of Dynamic Pairwise Wake Vortex Separations for Approach and Landing

    Article • June 2011, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  52. Crosswind thresholds supporting wake-vortex-free corridors for departing aircraft

    Article • Meteorological Applications, May 2011, Wiley

    Dr.-Ing. habil. Frank Holzäpfel

  53. Assessment of Wake-Vortex Encounter Probabilities for Crosswind Departure Scenarios

    Article • Journal of Aircraft, May 2011, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  54. Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Vortex Decay

    Article • January 2011, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  55. In-situ observations of young contrails – overview and selected results from the CONCERT campaign

    Article • Atmospheric Chemistry and Physics", September 2010, Copernicus GmbH

    Dr.-Ing. habil. Frank Holzäpfel, Manfred Wendisch

  56. Wake-Vortex Topology, Circulation, and Turbulent Exchange Processes

    Article • August 2010, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  57. Aircraft Wake Vortex Scenarios Simulation Package for Takeoff and Departure

    Article • Journal of Aircraft, March 2009, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  58. Aircraft wake vortex scenarios simulation package – WakeScene

    Article • Aerospace Science and Technology, January 2009, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  59. Aircraft Wake Vortex Scenarios Simulation For Take-Off and Departure

    Article • September 2008, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  60. Skill of an Aircraft Wake-Vortex Model Using Weather Prediction and Observation

    Article • Journal of Aircraft, March 2008, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  61. Aircraft wake vortices – prediction and mitigation

    Article • PAMM, December 2007, Wiley

    Dr.-Ing. habil. Frank Holzäpfel

  62. High-Resolution Weather Database for the Terminal Area of Frankfurt Airport

    Article • Journal of Applied Meteorology and Climatology, November 2007, American Meteorological Society

    Dr.-Ing. habil. Frank Holzäpfel

  63. Aircraft Wake-Vortex Evolution in Ground Proximity: Analysis and Parameterization

    Article • AIAA Journal, January 2007, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  64. Probabilistic Two-Phase Aircraft Wake-Vortex Model: Further Development and Assessment

    Article • Journal of Aircraft, May 2006, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  65. Aircraft Wake-Vortex Evolution in Ground Proximity: Analysis and Parameterization

    Article • January 2006, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  66. Research towards a wake-vortex advisory system for optimal aircraft spacing

    Article • Comptes Rendus Physique, May 2005, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  67. Probabilistic Two-Phase Aircraft Wake Vortex Model: Application and Assessment

    Article • Journal of Aircraft, September 2004, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  68. Adjustment of Subgrid-Scale Parametrizations to Strong Streamline Curvature

    Article • AIAA Journal, July 2004, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  69. Strategies for Circulation Evaluation of Aircraft Wake Vortices Measured by Lidar

    Article • Journal of Atmospheric and Oceanic Technology, August 2003, American Meteorological Society

    Dr.-Ing. habil. Frank Holzäpfel

  70. Probabilistic Wake Vortex Decay Model Predictions Compared with Observations

    Article • June 2003, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  71. Analysis of wake vortex decay mechanisms in the atmosphere

    Article • Aerospace Science and Technology, June 2003, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  72. Probabilistic Two-Phase Wake Vortex Decay and Transport Model

    Article • Journal of Aircraft, March 2003, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  73. Velocity‐Fields, Reynolds Stresses, and Swirl‐Induced Intermittency in Free and Enclosed Rotating Flows

    Article • September 2002, Wiley

    Dr.-Ing. habil. Frank Holzäpfel

  74. Commercial aircraft wake vortices

    Article • Progress in Aerospace Sciences, April 2002, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  75. Short-term prediction of the horizontal wind vector within a wake vortex warning system

    Article • Meteorological Applications, March 2002, Wiley

    Dr.-Ing. habil. Frank Holzäpfel

  76. A Probabilistic Prediction Scheme for Wake Vortex Evolution in a Convective Boundary Layer

    Article • Air Traffic Control Quarterly, January 2002, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  77. The turbulent decay of trailing vortex pairs in stably stratified environments

    Article • Aerospace Science and Technology, February 2001, Elsevier

    Dr.-Ing. habil. Frank Holzäpfel

  78. Article • International Applied Mechanics, January 2001, Springer Science + Business Media

    Dr.-Ing. habil. Frank Holzäpfel

  79. Wake Vortices in Convective Boundary Layer and Their Influence on Following Aircraft

    Article • Journal of Aircraft, November 2000, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  80. Wing-Tip Vortices, Turbulence, and the Distribution of Emissions

    Article • AIAA Journal, October 1999, American Institute of Aeronautics and Astronautics (AIAA)

    Dr.-Ing. habil. Frank Holzäpfel

  81. Quintuple Hot-Wire Measurements of the Turbulence Structure in Confined Swirling Flows

    Article • Journal of Fluids Engineering, January 1999, ASME International

    Dr.-Ing. habil. Frank Holzäpfel

  82. Assessment of a quintuple hotwire measurement technique for highly turbulent flows

    Article • Experiments in Fluids, December 1994, Springer Science + Business Media

    Dr.-Ing. habil. Frank Holzäpfel

  83. Aircraft wake vortices in the atmosphere

    Article • Springer Science + Business Media

    Dr.-Ing. habil. Frank Holzäpfel