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Andy Aspden

Andy Aspden

PhD alumnus, MILES simulations of thermal turbulent jets.


Biography:

Andy was a PhD student and a member of Selwyn College. His thesis was on "Monotone integrated large eddy simulation of buoyant turbulent jets with off-source heating". 

He subsequently gained a Glenn T Seaborg Postdoctoral Fellowship at the Centre for Computational Sciences and Engineering, Lawrence Berkley National Laboratory. His primary research focus is the simulation of turbulent fluid dynamics. Specific interests include implicit large eddy simulation, premixed combustion, type Ia supernovae, and turbulent jets and plumes. He became a Lecturer in the School of Engineering at the University of Portsmouth in September 2011.

Key Publications

A. Nonaka, A. J. Aspden, M. Zingale, A. S. Almgren, J. B. Bell, and S. E. Woosley, "High-Resolution Simulations of Convection Preceding Ignition in Type Ia Supernovae Using Adaptive Mesh Refinement", Astrophysical Journal, 745, 73, (2012). [pdf]

A. S. Almgren, A. J. Aspden, J. B. Bell, and M. L. Minion, "On the Use of Higher-Order Projection Methods for Incompressible Turbulent Flow", submitted for publication. [pdf]

A. J. Aspden, J. B. Bell, S. Dong, and S. E. Woosley, "Burning Thermals in Type Ia Supernovae", Astrophysical Journal, 738, 94-107, (2011). [ApJ] [pdf]

S. E. Woosley, A. R. Kerstein, and A. J. Aspden, "Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame", Astrophysical Journal, 734, 37-41, (2011). [ApJ] [pdf]

A. J. Aspden, M. S. Day, and J. B. Bell, "Turbulence-flame interactions in lean premixed hydrogen: transition to the distributed burning regime", Journal of Fluid Mechanics, 680, 287-320, (2011). doi:10.1017/jfm.2011.164. [JFM] [pdf]

A. J. Aspden, J. B. Bell, and S. E. Woosley, "Turbulent Oxygen Flames in Type Ia Supernovae", Astrophysical Journal, 730, 144-151, (2011). [ApJ] [pdf]

A. J. Aspden, M. S. Day, and J. B. Bell, "Characterization of Low Lewis Number Flames", Proc. Combust. Inst., 33, 1463-1471, (2011). [PCI]

A. J. Aspden, M. S. Day, and J. B. Bell, "Lewis Number Effects in Distributed Flames", Proc. Combust. Inst., 33, 1473-1480, (2011). [PCI]

A. J. Aspden, J. B. Bell, S. E. Woosley, "Distributed Flames in Type Ia Supernovae", Astrophysical Journal, 710, 1654-1663, (2010). [ApJ] [pdf]

S. E. Woosley, A. R. Kerstein, V. Sankaran, A. J. Aspden and F. Ropke "Type Ia Supernovae: Calculations of Turbulent Flames Using the Linear Eddy Model", Astrophysical Journal, 704, 255-273, (2009). [ApJ]

M. M. Scase, A. J. Aspden, and C. P. Caulfield, "The effect of sudden source buoyancy flux increases on turbulent plumes", Journal of Fluid Mechanics, 635, 137-169, (2009). [JFM+cover]

A. J. Aspden, J. B. Bell, M. S. Day, S. E. Woosley, M. Zingale, "Turbulence-Flame Interactions in Type Ia Supernovae", Astrophysical Journal, 689, 1173-1185, (2008). [ApJ] [pdf] [pdf2]

A. J. Aspden, N. Nikiforakis, S. B. Dalziel, and J. B. Bell, "Analysis of Implicit LES Methods", Communications in Applied Mathematics and Computational Science, 3, 103-126, (2008). [CAMCoS] [pdf]

P. A. Davidson, B. Sreenivasan, and A. J. Aspden, "Evolution of localised blobs of swirling or buoyant fluid with and without an ambient magnetic field", Physical Review E 75, 1, (2007). [PRE]