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This paper presents several models which can be applied to simulate the gas absorption in countercurrent packed bed columns with first-order chemical reaction. The hydrodynamic models predict the velocity profile in liquid film for both laminar and turbulent conditions by using the interfacial drag which is the result of gas side interaction on liquid flow rate. As the gas or liquid flow rates increase,...
The electromagnetic (EM) bias is an important error term in sea-surface height estimation from satellite radar altimetry. While the EM bias has been studied extensively, previous studies have utilized hydrodynamic and EM models that require an a priori separation of the sea surface into “long” and “short” waves that are then treated separately. This paper presents a study of the EM bias that avoids...
This research explores the potential of remote sensing techniques to derive distributed Manning's roughness coefficient (Manning's n) for the use in hydrodynamic models for numerical simulation of open channel flow in natural channels and flood plains. Normalized Difference Vegetation Index (NDVI) based land use land cover (LU/LC) data was generated using the Landsat 5 Thematic Mapper (TM) and Advance...
In the present paper, a typical seafloor mining tool (SMT) is demonstrated. With considering the influence of ocean currents and ocean wave, the force analysis is carried out to SMT. There are five forces that effect SMT, they are as following: gravity, buoyancy, hydraulic drag force, tension of the riser and added mass forces. The results of force analysis strongly suggest that the added mass forces...
Recently published results (Mao and Heron, J. Phys. Oceanog., 2008) comparing sea surface currents, measured by a 30 MHz ocean radar with wind speed and direction under a range of conditions in Bass Strait, Victoria, Australia indicate that the coupling between wind and surface currents depends on the maturity of the sea wave spectrum. For a mature sea the main contribution to surface current is usually...
Paper describes the complex of hydrodynamic models that will serve as a basis for creating the operational forecast system for the coastal zone of the Russian part of the Gulf of Finland. The complex includes an atmospheric model, hydrodynamic models of the Baltic Sea as well as regional models with high spatial resolution. The test runs with SPBM (St.Petersburg Baltic Model) and NEVAM (Neva Bay model)...
The dynamics (currents, pressures/elevations, waves and density field) of Liverpool Bay, Irish Sea, have been measured and modelled continuously since August 2002 in an integrated programme. The Bay has strong tidal mixing, receives fresh water from several estuaries and stratifies intermittently. The measurements include 600 kHz ADCPs sampling the water column in 1 m bins at two sites in water 25...
The SIMS doping profile of SiGe heterojunction bipolar transistor is calibrated for best agreement of the hydrodynamic model results with the experiment. DC and small-signal data is used for the calibration. The terminal current noise calculations are performed using both hydrodynamic and drift-diffusion models with the calibrated doping profile. The calculation results are compared with the experimental...
An effective method for performing the thermal optimization of strip-fin heat sinks with a ducted air flow under constraints of pressure drop, mass, and space limitations has been successfully developed. The thermal and hydrodynamic models for strip-fin heat sinks have been developed. The design of experiments approach is performed to explore the relationships between design variables and responses...
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