Over the last decade, computational methods have been intensively applied to a variety of scientific researches and engineering designs. Although the computational fluid dynamics （CFD） method has played a dominant r...Over the last decade, computational methods have been intensively applied to a variety of scientific researches and engineering designs. Although the computational fluid dynamics （CFD） method has played a dominant role in studying and simulating transport phenomena involving fluid flow and heat and mass transfers, in recent years, other numerical methods for the simulations at meso- and micro-scales have also been actively applied to solve the physics of complex flow and fluid-interface interactions. This paper presents a review of recent advances in multi-scale computational simulation of biomimetics related fluid flow problems. The state-of-the-art numerical techniques, such as lattice Boltzmann method （LBM）, molecular dynamics （MD）, and conventional CFD, applied to different problems such as fish flow, electro-osmosis effect of earthworm motion, and self-cleaning hydrophobic surface, and the numerical approaches are introduced. The new challenging of modelling biomimetics problems in developing the physical conditions of self-clean hydrophobic surfaces is discussed.展开更多
The influence of macronitrogen （NO3 and NH＋） addition with Ulva pertusa on dissolved inorganic carbon system in seawater was studied. The results indicate that p（C02） and HCO3 concentration decrease significantly...The influence of macronitrogen （NO3 and NH＋） addition with Ulva pertusa on dissolved inorganic carbon system in seawater was studied. The results indicate that p（C02） and HCO3 concentration decrease significantly, while pH and CO32- concentration increase significantly. When the con- centration of NO3 was less than 71 μmol/dm3 or NH4＋ was less than 49.7μmol/dm3, dissolved inorganic carbon （DIC） absorption rates by Ulva pertusa generally increased with the increasing of nitrogen concentration. The DIC decreased 151 μmol/dm3 with the addition of 71 μmol/dm3 NO3 and decreased 232 μmol/dm3 with the addition of 49.7 μmol/dm3 NH＋ after the experiment compared with DIC measured without nitrogen addition. A significant negative-correlation was found between Ac（DIC） and growth rate （#） of Ulva pertusa （r =- 0.91, P 〈0.000 1, n=11）. NH＋ had more influence on the species of inorganic carbon system than NO3.展开更多
The history of development and current situation of the theoretical description and numerical modeling of the solidification process are reviewed.The status and problems of the related research are discussed,with the ...The history of development and current situation of the theoretical description and numerical modeling of the solidification process are reviewed.The status and problems of the related research are discussed,with the main focus being on the solidification theories associated with microstructure formation and the concurrent macro-/microcoupling methods used to simulate solidification.Furthermore,the development trends of the theoretical description and numerical modeling of solidification are discussed.展开更多
文摘Over the last decade, computational methods have been intensively applied to a variety of scientific researches and engineering designs. Although the computational fluid dynamics （CFD） method has played a dominant role in studying and simulating transport phenomena involving fluid flow and heat and mass transfers, in recent years, other numerical methods for the simulations at meso- and micro-scales have also been actively applied to solve the physics of complex flow and fluid-interface interactions. This paper presents a review of recent advances in multi-scale computational simulation of biomimetics related fluid flow problems. The state-of-the-art numerical techniques, such as lattice Boltzmann method （LBM）, molecular dynamics （MD）, and conventional CFD, applied to different problems such as fish flow, electro-osmosis effect of earthworm motion, and self-cleaning hydrophobic surface, and the numerical approaches are introduced. The new challenging of modelling biomimetics problems in developing the physical conditions of self-clean hydrophobic surfaces is discussed.
基金The Key Laboratory of State Oceanic Administration for Marine Ecology and Environmental Science and Engineering,State Oceanic Administration under contract No.MESE-2008-07the Open Fund of North China Sea Branch,State Oceanic Administration under contract No.2010A01+1 种基金the Open Fund of State Oceanic Administration of China under contract No.2010503the Open Fund of Key Laboratory of Marine Ecology and Environmental Science,Institute of Oceanology,Chinese Academy of Sciences under contract No.KLMEES201003
文摘The influence of macronitrogen （NO3 and NH＋） addition with Ulva pertusa on dissolved inorganic carbon system in seawater was studied. The results indicate that p（C02） and HCO3 concentration decrease significantly, while pH and CO32- concentration increase significantly. When the con- centration of NO3 was less than 71 μmol/dm3 or NH4＋ was less than 49.7μmol/dm3, dissolved inorganic carbon （DIC） absorption rates by Ulva pertusa generally increased with the increasing of nitrogen concentration. The DIC decreased 151 μmol/dm3 with the addition of 71 μmol/dm3 NO3 and decreased 232 μmol/dm3 with the addition of 49.7 μmol/dm3 NH＋ after the experiment compared with DIC measured without nitrogen addition. A significant negative-correlation was found between Ac（DIC） and growth rate （#） of Ulva pertusa （r =- 0.91, P 〈0.000 1, n=11）. NH＋ had more influence on the species of inorganic carbon system than NO3.
基金supported by the National Basic Research Program of China(2011CB610402)
文摘The history of development and current situation of the theoretical description and numerical modeling of the solidification process are reviewed.The status and problems of the related research are discussed,with the main focus being on the solidification theories associated with microstructure formation and the concurrent macro-/microcoupling methods used to simulate solidification.Furthermore,the development trends of the theoretical description and numerical modeling of solidification are discussed.
