[1] After coastal upwelling, the water properties in the nearshore coastal region close to estuaries is determined by the race between the new estuarine plume traveling along the coast and the upwelled front (a marker for the old upwelled plume and the coastal pycnocline) returning to the coast under downwelling winds. Away from an estuary, downwelling winds can return the upwelled front to the...

Air distribution systems in commercial aircraft cabins are important for providing a healthy and comfortable environment for passengers and crew. The mixing air distribution systems used in existing aircraft cabins create a uniform air temperature distribution and dilute contaminants in the cabins. The mixing air distribution systems could spread infectious airborne diseases. To improve the air...

[1] We present shipboard observations of very strong convergence, vertical velocities and mixing, and nearbed impacts associated with the leading-edge front of the tidally-pulsed Columbia River plume. With upwellingfavorable winds and riverflow of 4900 ms , the plume propagates as a buoyant gravity current with a rotary, borelike vertical frontal circulation and downwelling as strong as 0.35 m ...

Air pollution in urban areas has important implications for health and environmental management. Consequently, various methodologies have been developed for its assessment. Traditionally, simple approaches such as the box model or the Gaussian plume have been used to assess urban air quality. The use of Eulerian grid models, which provide a more realistic and comprehensive description of the ur...

The Computational Fluid Dynamics code Overflow includes as one of its solver options an algorithm which is a fairly small piece of code but which accounts for a significant portion of the total computational time. This paper studies some of the issues in accelerating the code by using a Graphics Processing Unit (GPU). The algorithm needs to be modified to be suitable for a GPU, and attention ne...

OF THESIS MODELING WIND IN COMPLEX TERRAIN FOR USE IN FIRE SPREAD PREDICTION Currently, no methods of predicting microscale, terrain influenced winds are available to fire managers. This study evaluated three methods of providing surface wind information to fire growth models. One was simply a uniform wind speed and direction, a method that has been traditionally used, and the other two types w...

A relativistic Eulerian Vlasov code is presented to simulate laser-plasma interactions. Eulerian Vlasov codes have a very low noise level and allow detailed analysis of lowdensity regions of phase-space. The code we present is 1D (one space dimension x and one momentum dimension px) with a fluid momentum py, and includes both ion and electron dynamics. The laser is incident from the left as a t...

NEMO is a fluid dynamics code used for oceanographic research. Within the TERAFLOP Workbench in cooperation with the Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) in Kiel a performance assessment and improvement campaign was carried out, ranging from MPI to memory addressing in solvers. At The High Performance Computing Center Stuttgart (HLRS) tests were made using a large configuratio...

Geophysical Fluid Dynamics (GFD) came of age in the 1950s and 1960s, with the mathematically inspired work of Charney, Lorenz, Stommel, Veronis and von Neumann, among others. In the last twenty years or so, mathematical, statistical and numerical developments for the Navier-Stokes equations and basic geophysical fluid dynamics models are stimulating a deepening and broadening of its central con...