TY - GEN A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - Probability density functions in the cloud-top mixing layer Y1 - 2010 UR - http://iopscience.iop.org/1367-2630/12/8/085010/pdf/1367-2630_12_8_085010.pdf ER - TY - GEN A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - Two-fluid formulation of the cloud-top mixing layer for direct numerical simulation T2 - Theoretical and computational fluid dynamics N2 - A mixture fraction formulation to perform direct numerical simulations of a disperse and dilute two-phase system consisting of water liquid and vapor in air in local thermodynamic equilibrium using a twofluid model is derived and discussed. The goal is to understand the assumptions intrinsic to this simplified but commonly employed approach for the study of two-layer buoyancy reversing systems like the cloud-top mixing layer. Emphasis is placed on molecular transport phenomena. In particular, a formulation is proposed that recovers the actual nondiffusive liquid-phase continuum as a limiting case of differential diffusion. High-order numerical schemes suitable for direct numerical simulations in the compressible and Boussinesq limits are described, and simulations are presented to validate the incompressible approach. As expected, the Boussinesq approximation provides an accurate and efficient description of the flow on the scales (of the order of meters) that are considered. KW - Free convection KW - Free turbulent flows KW - Multiphase KW - Stratocumulus clouds Y1 - 2010 U6 - https://doi.org/10.1007/s00162-010-0182-x SN - 1432-2250 SN - 0935-4964 VL - 24 IS - 6 SP - 511 EP - 536 ER - TY - GEN A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - Buoyancy reversal in cloud-top mixing layers T2 - Quarterly Journal of the Royal Meteorological Society Y1 - 2009 U6 - https://doi.org/10.1002/qj.417 SN - 1477-870X VL - 135 IS - 641 SP - 963 EP - 978 ER - TY - CHAP A1 - Mellado, Juan Pedro A1 - Schmidt, Heiko A1 - Stevens, Bjorn A1 - Peters, Norbert T1 - Analysis of the cloud top mixing layer using DNS Y1 - 2009 ER - TY - CHAP A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - The evaporatively driven cloud-top mixing layer T2 - 63rd Annual Meeting of the APS Division of Fluid Dynamics Y1 - 2010 UR - http://meetings.aps.org/Meeting/DFD10/Event/133816 ER - TY - CHAP A1 - Dietze, Eckhard A1 - Stevens, Bjorn A1 - Mellado, Juan Pedro A1 - Peters, Norbert A1 - Schmidt, Heiko T1 - Level set methods for meteorological multi scale problems T2 - EGU General Assembly 2010, held in Vienna, Austria, 02 – 07 May 2010 Y1 - 2010 UR - http://meetingorganizer.copernicus.org/EGU2010/EGU2010-10083.pdf N1 - EGU2010-10083 ER - TY - CHAP A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - Buoyancy reversal in the cloud-top mixing layer T2 - 4th IMS Turbulence Workshop, Workshop, 23-25 March 2009, Y1 - 2009 UR - http://publications.mi.fu-berlin.de/711/ ER - TY - CHAP A1 - Mellado, Juan Pedro A1 - Schmidt, Heiko A1 - Stevens, Bjorn A1 - Peters, Norbert T1 - DNS of the turbulent cloud-top mixing layer T2 - Advances in turbulence XII, proceedings of the 12th EUROMECH European Turbulence Conference, September 7 - 10, 2009, Marburg, Germany Y1 - 2009 SN - 978-3-642-03084-0 SP - 401 EP - 404 PB - Springer CY - Berlin [u.a.] ER - TY - CHAP A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - Investigation of the Cloud-Top Interface Using Direct Numerical Simulation T2 - Oberwolfach reports, Mathematical Theory and Modelling in Atmosphere-Ocean Science Y1 - 2010 U6 - https://doi.org/10.4171/OWR/2010/34 VL - 7 IS - 3 SP - 2061 EP - 2062 ER - TY - CHAP A1 - Schmidt, Heiko A1 - Mellado, Juan Pedro A1 - Peters, Norbert A1 - Stevens, Bjorn T1 - Towards a modular superparameterization for Stratocumulus clouds considering unsteady entrainment T2 - 4th PAN-GCSS Meeting on Advances in modeling and observing clouds and convection, 2-6 June 2008, Toulouse, France Y1 - 2008 UR - http://www.knmi.nl/~siebesma/PAN-GCSS/abstracts_poster_session_2_wednesday.pdf ER - TY - CHAP A1 - Schmidt, Heiko A1 - Mellado, Juan Pedro A1 - Peters, Norbert A1 - Stevens, Bjorn T1 - Towards modular front tracking for Stratocumulus clouds considering unsteady entrainment processes T2 - European Geosciences Union General Assembly 2008, Vienna, Austria, 13 – 18 April 2008 Y1 - 2008 UR - http://www.cosis.net/members/meetings/abstracts/file.php/49/102930/pdf/EGU2008-A-04762.pdf N1 - EGU2008-A-04762 PB - European Geophysical Society CY - Katlenburg-Lindau ER - TY - CHAP A1 - Mellado, Juan Pedro A1 - Stevens, Bjorn A1 - Schmidt, Heiko A1 - Peters, Norbert T1 - New results about the cloud-top entrainment instability T2 - Conference on Multiple Scales in Fluid Dynamics and Meteorology Y1 - 2011 UR - http://metstroem.mi.fu-berlin.de/wp/wp-content/uploads/2012/06/Juan-Pedro-Mellado.pdf ER -