Mixing by Non-linear Gravity Wave Breaking on a White Dwarf Surface
  We present the results of a simulation of a wind-driven non-linear gravity wave breaking on the surface of a white dwarf. The ``wind'' consists of H/He from an accreted envelope, and the simulation demonstrates that this breaking wave mechanism can produce a well-mixed layer of H/He with C/O from the white dwarf above the surface. Material from this mixed layer may then be transported throughout the accreted envelope by convection, which would enrich the C/O abundance of the envelope as is expected from observations of novae. 
A. C. Calder, A. Alexakis, L. J. Dursi, R. Rosner, J. W. Truran, B.   Fryxell P. Ricker, M. Zingale, K. Olson, F. X. Timmes,...