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RISA Latent Heat Retrieval and Its Effects on the Intensity and Structure Change of Hurricane Guillermo (1997). Part II: Numerical Simulations
Publisher: American Meteorological Society
Abstract: n Part I of this study, a new algorithm for retrieving the latent heat field in tropical cyclones from airborne Doppler radar was presented and fields from rapidly intensifying Hurricane Guillermo (1997) were shown. In ...
Thermally Forced Low Froude Number Flow past Three-Dimensional Obstacles
Publisher: American Meteorological Society
Abstract: The present study extends the discussion of the flow of a density-stratified fluid past three-dimensional obstacles for Froude number O(1) to flows past an isolated obstacle with heated/cooled surface. The study focuses ...
High-Resolution Simulation of the Electrification and Lightning of Hurricane Rita during the Period of Rapid Intensification
Publisher: American Meteorological Society
Abstract: In this paper, a high-resolution simulation establishing relationships between lightning and eyewall convection during the rapid intensification phase of Rita will be highlighted. The simulation is an attempt to relate ...
A Study of Cloud Mixing and Evolution Using PDF Methods. Part I: Cloud Front Propagation and Evaporation
Publisher: American Meteorological Society
Abstract: The evolution of mean relative humidity (RH) is studied in an isobaric system of clear and cloudy air mixed by an incompressible velocity field. A constant droplet radius assumption is employed that implies a simple ...
Application of the Volume-of-Fluid Method to the Advection–Condensation Problem
Publisher: American Meteorological Society
Abstract: The authors demonstrate the application of the volume of fluid (VOF) method, a specialized grid refinement technique, to the numerical simulation of clouds. In particular, it is shown that VOF eliminates most of the ...
Another Look at Stochastic Condensation for Subgrid Cloud Modeling: Adiabatic Evolution and Effects
Publisher: American Meteorological Society
Abstract: The theory of stochastic condensation, which models the impact of an ensemble of unresolved supersaturation fluctuations S? on the volume-averaged droplet-size distribution f?(r), is revisited in the modern context of ...
The Tilted Rocket Rig: A Rayleigh–Taylor Test Case for RANS Models1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: ReynoldsAveraged Navier–Stokes (RANS) models remain the most common design tool in a wide variety of fluid mixing applications. This includes variabledensity turbulent mixing as occurs in inertial confinement fusion. The ...
The Impacts of Dry Dynamic Cores on Asymmetric Hurricane Intensification
Publisher: American Meteorological Society
Abstract: he fundamental pathways for tropical cyclone (TC) intensification are explored by considering axisymmetric and asymmetric impulsive thermal perturbations to balanced, TC-like vortices using the dynamic cores of three ...
Determining Key Model Parameters of Rapidly Intensifying Hurricane Guillermo (1997) Using the Ensemble Kalman Filter
Publisher: American Meteorological Society
Abstract: n this work the authors determine key model parameters for rapidly intensifying Hurricane Guillermo (1997) using the ensemble Kalman filter (EnKF). The approach is to utilize the EnKF as a tool only to estimate the parameter ...
Evolution of Eyewall Convective Events as Indicated by Intracloud and Cloud-to-Ground Lightning Activity during the Rapid Intensification of Hurricanes Rita and Katrina
Publisher: American Meteorological Society
Abstract: ightning data (cloud-to-ground plus intracloud) obtained from the Los Alamos Sferic Array (LASA) for 2005?s Hurricanes Rita and Katrina were analyzed to provide a first insight into the three-dimensional electrical activity ...