David Lewellen

Education and Professional Background: Ph.D. (Physics), Cornell, 1987; B.S.E. (Mech. and Aero. Eng.), Princeton, 1982. WVU, 1993-Present; Inst. of Theoretical Physics, Univ. of Calif.-Santa Barbara, 1990-93; Stanford Univ., 1987-90.

Research interests: Fluid dynamic turbulence, large eddy simulations of environmental flows, elementary particle physics, and superstring theory.

Lewellen, D. C. and W. S. Lewellen.  "Near-surface Intensification of Tornado Vortices"  J. of the Atmospheric Sciences, 64:2176-2194, 2007.

Stevens, B., C-H. Moeng, A. Ackerman, C. Bretherton, A. Chlond, S. de Roode, J. Edwards, J-C. Golaz, H. Jiang, M. Khairoutdinov, M. Kirkpatrick, D. Lewellen, A. Lock, F. Müller, D. Stevens, E. Whelan, and P. Zhu.  "Evaluation of Large-Eddy Simulations via Observations of Nocturnal Marine Stratocumulus",  Mon. Wea. Rev., 133:1443-1462, 2005.

Cuxart, J., A. Holtslag, R. Beare, E. Bazile, A. Beljaars, A. Cheng, L. Conangla, M. Ek, F. Freedman, R. Hamdi, A. Kerstein, H. Kitagawa, G. Lenderink, D. Lewellen, J. Mailhot, T. Mauritsen, V. Perov, G. Schayes, G-J. Steeneveld, G. Svensson, P. Taylor, W. Weng, S. Wunsch, and K-M. Xu.  "Single-column Model Intercomparison for a Stably Stratified Atmospheric Boundary Layer",  Bound.-Layer Meteor., 118:273-303, 2006.

Beare, R., M. MacVean, A. Holtslag, J. Cuxart, I. Esau, J-C. Golaz, M. Jimenez, M. Khairoutdinov, B. Kosovic, D. Lewellen, T. Lund, J. Lundquist, A. McCabe, A. Moene, Y. Noh, S. Raasch, and P. Sullivan.  "An Intercomparison of Large-Eddy Simulations of the Stable Boundary Layer",  Bound.-Layer Meteor.,118:247-272, 2006.

Duynkerke, P. G., S. R. de Roode, M. C. van Zanten, J. Calvo, J. Cuxart, S. Cheinet, A. Chlond, H. Grenier, P. J. Jonker, M. Köhler, G. Lenderink, D. Lewellen, C-L. Lappen, A. Lock, C-H. Moeng, F. Müller, D. Olmeda, J-M. Piriou, E. Sanchez, and I. Sednev.  "Observations and Numerical Simulations of the Diurnal Cycle of the EUROCS Stratocumulus Case",  Quarterly J. of the Royal Met. Soc.,130:3269-3296, 2004.

Lewellen, D. C. and W. S. Lewellen.  "Buoyancy Flux Modeling for Cloudy Boundary Layers",  J. of the Atmospheric Sciences, 61:1147-1160, 2004.

Xia, J., W.S. Lewellen and D.C. Lewellen.  "Influence of Mach number on tornado corner flow dynamics",  J. of the Atmospheric Sciences, 60:2820-2825, 2003.

Siebesma, A.P.,  C. S. Bretherton, A.R. Brown, A. Chlond, J. Cuxart, P.G. Duynkerke, H. Jiang, M. Khairoutdinov, D.C. Lewellen, C-H. Moeng, E. Sanchez, B. Stevens, and D.E. Stevens.  "A large-eddy simulation intercomparison study of shallow cumulus convection",   J. of the Atmospheric Sciences, 60:1201-1219, 2003.

Lewellen, D.C. and W. S. Lewellen,  "Entrainment and Decoupling Relations for Cloudy Boundary Layers",  J. of the Atmospheric Sciences, 59:2966-2986, 2002.

Brown, A. R. , R.T. Cederwall, A. Chlond, P.G. Duynkerke, C. Golaz, M. Khairoutdinov,  D. C. Lewellen, A. P. Lock,  M. K. MacVean, C-H. Moeng, R. A. J. Neggers, A. P. Siebesma and B. Stevens,  "Large-eddy Simulation of the Diurnal Cycle of Shallow Cumulus Convection over Land", Quarterly J. of the Royal Met. Soc., 128:1075-1093, 2002.

Lewellen, D.C., and W. S. Lewellen,  "The Effects of Aircraft Wake Dynamics on measured and simulated NOx and HOx Wake Chemistry", Journal of Geophysical Research,  Vol. 106, 27661-27672, 2001.

Stevens, B., A. Ackerman, B. Albrecht, A. Brown, A. Chlond, J. Cuxart, P. Duynkerke, D. Lewellen, M. MacVean, E. Sanchez, A. P. Siebesma and D. Stevens. "Trade-wind Cumuli Under a Strong Inversion",  J. of the Atmospheric Sciences, Vol. 58, 1870-1891, 2001.

Lewellen, D.C. and W. S. Lewellen. "The Effects of Aircraft Wake Dynamics on Contrail Development". J. Atmos. Sci., 58:390-406, 2001.

Lewellen, D.C., W. S. Lewellen, and J. Xia. The Influence of a Local Swirl Ratio on Tornado Intensification near the Surface. J. Atmos. Sci., 57:527-544, 2000.

Bretherton, C. S., M. MacVean, P. Bechtold, A. Chlond, W. Cotton, J. Cuxart, H. Cuijpers, M. Khairouitdinov, B. Kosovic, D. Lewellen, C-H. Moeng, P. Siebesma, B. Stevens, D. Stevens, I. Sykes, and M. Wyant. An intercomparison of radiatiatively-driven entrainment and turbulence in a smoke cloud, as simulated by different numerical models. Quarterly J. of the Royal Met. Soc., 125:391-423, 1999.

Lewellen, D.C., W. S. Lewellen, L. R. Poole, R. J. Decoursey, G. M. Hansen, C. A. Hostetler, and G. S. Kent. Large-Eddy Simulations and Lidar Measurements of Vortex-Pair Breakup in Aircraft Wakes. AIAA Journal, 36:1439 - 1445, 1998.

D. C. Lewellen and W. S. Lewellen. Large-Eddy Boundary Layer Entrainment. J. Atmos. Sci., 55:2645-2665, 1998.

W. S. Lewellen, D. C. Lewellen, and R. I. Sykes. Large-Eddy Simulation of a Tornado's Interaction with the Surface. J. Atmos. Sci., 54:581-605, 1997.

D. C. Lewellen and W. S. Lewellen. Large-Eddy Simulations of the Vortex-Pair Breakup in Aircraft Wakes. AIAA Journal, 34:2337-2345, 1996.

D.C. Lewellen, W. S. Lewellen, and S. Yoh. Influence of Bowen Ratio on Boundary Layer Cloud Structure. J. Atmos. Sci., 53:175-187, 1996.

G. Cleaver and D. C. Lewellen. On Modular Invariant Partition Functions for Tensor Products of Conformal Fieldtheories. Phys. Lett., B300:354-360, 1993.

D. C. Lewellen. Effective String Amplitudes for Hadronic Physics. Nucl.Phys., B392:137-161, 1993.

D. C. Lewellen. Sewing Constraints for Conformal Field Theories on Surfaces with Boundaries. Nucl. Phys., B[FS]372:654-682, 1992.

J. Cardy and D. C. Lewellen. Bulk and Boundary Operators in Conformal Field Theory. Phys. Lett., B259:274-278, 1991.

D. C. Lewellen. Embedding Higher Level Kac-Moody Algebras in Heterotic String Models. Nucl. Phys., B337:61-86, 1990.

D. C. Lewellen. Constraints for Conformal Field Theories on the Plane: Reviving the Conformal Bootstrap. Nucl. Phys., B320:345-376, 1989.

I. Antoniadis, C. Bachas, D. C. Lewellen, and T.N. Tomaras. On Supersymmetry Breaking in Superstrings. Phys. Lett., 207B:441, 1988.

H. Kawai, D. C. Lewellen, J.A. Schwartz, and S.-H.H. Tye. The Spin Structure Construction of String Models and Multiloop Modular Invariance. Nucl. Phys., B299:431, 1988.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. Construction of Four-dimensional Fermionic String Models with a Generalized Supercurrent. Int. J. Mod. Phys., A3:279, 1988.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. Four-dimensional Type-II Strings and their Extensions: Type-III Strings. Phys. Lett., 191B:63, 1987. *.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. Construction of Fermionic String Models in Four-dimensions. Nucl. Phys., B288:1-76, 1987. *.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. Construction of Four-dimensional Fermionic String Models. Phys. Rev. Lett., 57:1832, 1986.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. Classification of Closed Fermionic String Models. Phys. Rev., D34:3794-3804, 1986. *.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. A Relation between Tree Amplitudes of Closed and Open Strings. Nucl. Phys., B269:1, 1986.

P. B. Semmes, G. A. Leander, D. C. Lewellen, and F. Donau. Exchange Effects in The Interacting Boson-Fermion Model. Phys. Rev., C33:1476-1481, 1986.

* These papers also appear reprinted in Superstring Construction, Current Physics Sources and Comments, Vol. 4. A. Schellekens, ed. North Holland (1989).

Gong, B., D. C. Lewellen, and W. S. Lewellen.  "Effects of Fine-Scale Debris on Different Tornado Corner Flows".   In Preprints, 23rd Conference on Severe Local Storms, paaper P10.3, 5pp., St. Louis, MO, Nov. 6-10, 2006.  Amer. Meteor. Soc.

Huebsch, W. W. and D. C. Lewellen.  "Sensitivity Study on Contrail Evolution".   In 36th Fluid Dynamics Conference, paper 2006-3749, 14pp., San Francisco, CA, June 5-8, 2006.  AIAA.

Lewellen, D. C., B. Gong, W. S. Lewellen.  "Effects of Debris on Near-Surface Tornado Dynamics".  In Preprints, 22th Conference on Severe Local Storms, paper 15.5, 5pp., Hyannis, MA, Oct. 4-8, 2004.  Amer. Meteor. Soc.

Lewellen, D. C. and W. S. Lewellen.  "Simple, Large-Eddy, Buoyancy Flux Model for Cloudy Boundary Layers".  In Preprints, 16th Symposium on Boundary Layers and Turbulence, paper 1.2, 7pp., Portland, ME, Aug. 9-13, 2004.  Amer. Meteor. Soc.

Beare, R., M. MacVean, A. Holtslag, J. Cuxart, I. Esau, J-C. Golaz, M. Jimenez, M. Khairoutdinov, B. Kosovic, D. Lewellen, T. Lund, J. Lundquist, A. McCabe, A. Moene, Y. Noh, S. Raasch, and P. Sullivan.  "An Intercomparison of Large-Eddy Simulations of the Stable Boundary Layer".  In Preprints, 16th Symposium on Boundary Layers and Turbulence, paper 4.1, 3pp., Portland, ME, Aug. 9-13, 2004.  Amer. Meteor. Soc.

Fedorovich, E., R. Conzemius, I. Esau, F. Chow, D. Lewellen, C.-H. Moeng, P. Sullivan, D. Pino and J. Vila-Guerau de Arellano. "Entrainment Into Sheared Convective Boundary Layers as Predicted by Different Large Eddy Simulation Codes".  In Preprints, 16th Symposium on Boundary Layers and Turbulence, paper p4.7, 14pp., Portland, ME, Aug. 9-13, 2004.  Amer. Meteor. Soc.

D. C. Lewellen and W. S. Lewellen. "Cloud Structure and Entrainment in Marine Atmospheric Boundary Layers".  In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 2003 Annual Reports CD-ROM, December, 2003. 6 pages

D. C. Lewellen and W. S. Lewellen. "Modeling of cloud-top entrainment".  In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 2002 Annual Reports CD-ROM, June, 2003. 6 pages

D. C. Lewellen and W. S. Lewellen.  "Entrainment and large eddy structure in cloudy boundary layers".  In Preprints, 15th Symposium on Boundary Layers and Turbulence, pages 209-212, Wageningen, The Netherlands, July 15-19, 2002.  Amer. Meteor. Soc.

D. C. Lewellen and W. S. Lewellen. "Near-surface intensification during unsteady tornado evolution".  In Preprints, 21st Conference on Sever Local Storms, pages 481-484, San Antonio, TX, Aug. 12-16, 2002.  Amer. Meteor. Soc.

W.S. Lewellen, J. Xia, and D.C. Lewellen.  "Transonic velocities in tornadoes?"  In Preprints, 21st Conference on Sever Local Storms, pages 535-538, San Antonio, TX, Aug. 12-16, 2002.  Amer. Meteor. Soc.

D. C. Lewellen and W. S. Lewellen. "Modeling of cloud-top entrainment." In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 2001 Annual Reports CD-ROM, December, 2001. 6 pages

D. C. Lewellen and W. S. Lewellen. "Modeling of cloud-top entrainment." In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 2000 Annual Reports CD-ROM, December, 2000. 5 pages

D. C. Lewellen and W. S. Lewellen. "Boundary Layer Entrainment for Different Capping Conditions", In Proceedings of the 14th AMS Conference on Boundary Layers and Turbulence, pages 80-83, Aspen, CO, Aug 7-11, 2000.

D. C. Lewellen, W. S. Lewellen, and J. Xia. "Nonaxisymmetric, Unsteady Tornadic Corner Flows", Proceedings of the AMS 20th Conference on Severe Local Storms,  pages 265-268, Orlando, FL, Sept. 11-15, 2000.

B. Stevens, B. Albrecht, J. Cuxart, E. Sanchez, A. Brown, M. MacVean, A. Lock, P. Duynkerke, P. Siebesma, H. Jonker, A. Ackerman, A. Chlond, D. Lewellen, and D. Stevens. Cloud Fraction and Trade Cumulus: An LES Intercomparison Study. In Proceedings of the 13th AMS Conference on Boundary Layers and Turbulence, Dallas, TX, Jan 11-15, 1999.

D. C. Lewellen and W. S. Lewellen. "Modeling of cloud-top entrainment." In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 1999 Annual Reports CD-ROM, January, 2000. 5 pages

D. C. Lewellen and W. S. Lewellen. Effects of Aircraft Wake Dynamics on Contrail Development. In Abstracts-Conference on the Atmospheric Effects of Aviation, Virginia Beach, April 19-23, 1999. NASA.

D. C. Lewellen and W. S. Lewellen. Importance of Surface Layer Inflow to Tornado Vortex Intensity. In Proceedings of the AMS 19th Conf. on Severe Local Storms, Mineapolis, MN, Sept. 14-19, 1998.

D. C. Lewellen and W. S. Lewellen. Large-Eddy Simulations of Dynamical and Chemical Processes in the Near Wake of Subsonic Aircraft. In Abstracts-Conference on the Atmospheric Effects of Aviation, pages 210 - 213, Virginia Beach, April 27-May 1, 1998. NASA.

W. S. Lewellen and D. C. Lewellen. Modeling of Cloud-Top Entrainment. In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 1998 Annual Reports CD-ROM, January 1999. 4 pages.

D. C. Lewellen and W. S. Lewellen. LES Sensitivity Study of Cloud-Top Entrainment. In Proceedings of the AMS 12th Conference on Boundary Layer Turbulence, Vancouver, BC, July 28-31, 1997.

I. B. Celik, W. S. Lewellen, J. M. Kuhlman, E. Amin, A. Gel, D. C. Lewellen, J. Smith, and I. Yavus. Large Eddy Simulation of Diesel Combustion Chambers. For ARO/AFOSR Contractors meeting in Chemical Propulsion, Cleveland, OH, June 17-19, 1997.

W. S. Lewellen and D. C. Lewellen. Modeling of Cloud Scale Turbulent Transport. In Marine Meterorology Abstract Book FY 1996. Office of Naval Research Report, 1997.

D. C. Lewellen and W. S. Lewellen. Large-Eddy Simulations of Dispersion and Chemical Kinetics in the Vortex Breakup Region of Aircraft Wakes. In Abstracts-Conference on the Atmospheric Effects of Aviation, Virginia Beach, March 10-14, 1997. NASA.

D. C. Lewellen and W. S. Lewellen. The Role of Turbulent Mixing in the Chemistry and Dispersion of the Wake of Subsonic Aircraft. In Atmospheric Effects of Aviation: First Report of the Subsonic Assessment Project, pages B-69. NASA Reference Publication 1385, May 1996.

W. S. Lewellen and D. C. Lewellen. Modeling of Cloud Scale Turbulent Transport. In Office of Naval Research: Ocean, Atmosphere, Space Fiscal Year 1997 Annual Reports CD-ROM, January 1998. 4 pages.

W. S. Lewellen and D. C. Lewellen. Modeling of Cloud Scale Turbulent Transport. In Marine Meterorology Abstract Book FY 1995, pages 56-60. Office of Naval Research Report ONR 32296-6, 1996.

D. C. Lewellen and W. S. Lewellen. Large-Eddy Simulation of a Tornado's Interaction with the Surface. In Proceedings of the AMS 18th Conference on Severe Local Storms, pages 392-395, San Francisco, CA, February 1996.

W. S. Lewellen and D. C. Lewellen. Large-Eddy Simulations of the Vortex Breakup in Airplane Wakes. In Abstracts-Conference on the Atmospheric Effects of Aviation, Virginia Beach, April 23-28, 1995. NASA.

W. S. Lewellen and D. C. Lewellen. The Role of Turbulent Mixing in the Chemistry and Dispersion of the Wake of the Subsonic Aircraft. In Atmospheric Effects of Aviation Project: Near Field Interactions Workshop Report, William L. Grose, editor. NASA, August 22-24, 1994.

W. S. Lewellen, D. C. Lewellen, and S. Yoh. Modeling of Persistent Circulations in Boundary Layer Clouds. In Proceedings of the AMS 6th Conference on Mesoscale Processes, pages 304-307, Portland, Oregon, July 1994.

D. C. Lewellen. Tree Level Constraints on Conformal Field Theories and String Models. In Strings 89, R. Arnowitt et al., editors, Texas A&M, July 1990. World Scientific.

D. C. Lewellen. Construction of Closed Fermionic String Models in Four-Dimensions. PhD thesis, Cornell University, May 1987. UMI-87-24127-mc (microfiche).

H. Kawai, D. C. Lewellen, J. Schwartz, D. Senechal, and S.-H.H. Tye. Construction of Four-dimensional Fermionic String Models. In Proceedings of the Salt Lake City Meeting, C. DeTar and J. Ball, editors. World Scientific, 1987.

H. Kawai, D. C. Lewellen, and S.-H.H. Tye. Construction of Four-Dimensional Fermionic Strings: A Brief Review. In Superstrings, Cosmology, and Composite Structures, S. J. Gates and R. N. Mohapatra, editors, Texas A&M, July 1988. World Scientific. Also in Eighth Workshop on Grand Unification (Syracuse 1987), K. C. Wali, ed. World Scientific 1988.

Last updated: Jul. 30, 2007