Over the last decade,computational methods have been intensively applied to a variety of scientific researches and engi-neering designs. Although the computational fluid dynamics(CFD) method has played a dominant role...Over the last decade,computational methods have been intensively applied to a variety of scientific researches and engi-neering designs. Although the computational fluid dynamics(CFD) method has played a dominant role in studying and simu-lating 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 biomi-metics problems in developing the physical conditions of self-clean hydrophobic surfaces is discussed.展开更多
In view of the university computer culture foundation of college course,it is proposed that learners use efficient thinking methods to think.They must get rid of the prejudice of traditional teaching"narrow tool ...In view of the university computer culture foundation of college course,it is proposed that learners use efficient thinking methods to think.They must get rid of the prejudice of traditional teaching"narrow tool theory",based on computing thinking and university computer culture foundation.This paper proposed how to guide learners to use computing thinking to solve related problems in classroom teaching,introduced the application of computing thinking in computer classroom teaching,and proposed a curriculum with"computing thinking"as the core.The teaching method provides a new model for the university computer basic education with the goal of improving students'thinking ability.展开更多
Computer science concept and ability is crucial to modern information technology.As a basic computer science education,computational thinking has become one of the first courses for college students and the foundation...Computer science concept and ability is crucial to modern information technology.As a basic computer science education,computational thinking has become one of the first courses for college students and the foundation for training for non-computer professionals.Computational thinking is a way of thinking that students in all majors should master.In the process of teaching,students learn to use computational thinking to solve professional and technical problems and make good use of computer’s powerful tools.It is one of the major themes of recent teaching research.We set course objectives from issues-driven and correspond each class to the module objectives,so that the focus of course content is clear.The learning clues for the students are clear,which is conducive to the cultivation and improvement of computational thinking.展开更多
Due to the scale effect, the uniform distribution of reagents in continuous flow reactor becomes bad when the channel is enlarged to tens of millimeters. Microfluidic field strategy was proposed to produce high mixing...Due to the scale effect, the uniform distribution of reagents in continuous flow reactor becomes bad when the channel is enlarged to tens of millimeters. Microfluidic field strategy was proposed to produce high mixing efficiency in large-scale channel. A 3D spiral baffle structure(3SBS) was designed and optimized to form microfluidic field disturbed by continuous secondary flow in millimeter scale Y-shaped tube mixer(YSTM). Enhancement effect of the 3SBS in liquid-liquid homogeneous chemical processes was verified and evaluated through the combination of simulation and experiment. Compared with 1 mm YSTM, 10 mm YSTM with 3SBS increased the treatment capacity by 100 times, shortened the basic complete mixing time by 0.85 times, which proves the potential of microfluidic field strategy in enhancement and scale-up of liquid-liquid homogeneous chemical process.展开更多
The fine-scale heterogeneity of granular material is characterized by its polydisperse microstructure with randomness and no periodicity. To predict the mechanical response of the material as the microstructure evolve...The fine-scale heterogeneity of granular material is characterized by its polydisperse microstructure with randomness and no periodicity. To predict the mechanical response of the material as the microstructure evolves, it is demonstrated to develop computational multiscale methods using discrete particle assembly-Cosserat continuum modeling in micro- and macro- scales, respectively. The computational homogenization method and the bridge scale method along the concurrent scale linking approach are briefly introduced. Based on the weak form of the Hu-Washizu variational principle, the mixed finite element procedure of gradient Cosserat continuum in the frame of the second-order homogenization scheme is developed. The meso-mechanically informed anisotropic damage of effective Cosserat continuum is characterized and identified and the microscopic mechanisms of macroscopic damage phenomenon are revealed.展开更多
文摘Over the last decade,computational methods have been intensively applied to a variety of scientific researches and engi-neering designs. Although the computational fluid dynamics(CFD) method has played a dominant role in studying and simu-lating 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 biomi-metics problems in developing the physical conditions of self-clean hydrophobic surfaces is discussed.
基金supported by National Natural Science Foundation of Yunnan Agricultural University(Grant No.:2016ZR17)Yunnan Agricultural University Doctoral Research initial funding.
文摘In view of the university computer culture foundation of college course,it is proposed that learners use efficient thinking methods to think.They must get rid of the prejudice of traditional teaching"narrow tool theory",based on computing thinking and university computer culture foundation.This paper proposed how to guide learners to use computing thinking to solve related problems in classroom teaching,introduced the application of computing thinking in computer classroom teaching,and proposed a curriculum with"computing thinking"as the core.The teaching method provides a new model for the university computer basic education with the goal of improving students'thinking ability.
基金supported in part by the Production,Teaching and Research Project of the Ministry of Education in 2022.
文摘Computer science concept and ability is crucial to modern information technology.As a basic computer science education,computational thinking has become one of the first courses for college students and the foundation for training for non-computer professionals.Computational thinking is a way of thinking that students in all majors should master.In the process of teaching,students learn to use computational thinking to solve professional and technical problems and make good use of computer’s powerful tools.It is one of the major themes of recent teaching research.We set course objectives from issues-driven and correspond each class to the module objectives,so that the focus of course content is clear.The learning clues for the students are clear,which is conducive to the cultivation and improvement of computational thinking.
基金supported by the National Key Research and Development Program of China (2021YFC2101900 and 2019YFA0905000)National Natural Science Foundation of China (21908094, 21776130 and 22078150)+1 种基金Nanjing International Joint Research and Development Project (202002037)Top-notch Academic Programs Project of Jiangsu Higher Education Institutions。
文摘Due to the scale effect, the uniform distribution of reagents in continuous flow reactor becomes bad when the channel is enlarged to tens of millimeters. Microfluidic field strategy was proposed to produce high mixing efficiency in large-scale channel. A 3D spiral baffle structure(3SBS) was designed and optimized to form microfluidic field disturbed by continuous secondary flow in millimeter scale Y-shaped tube mixer(YSTM). Enhancement effect of the 3SBS in liquid-liquid homogeneous chemical processes was verified and evaluated through the combination of simulation and experiment. Compared with 1 mm YSTM, 10 mm YSTM with 3SBS increased the treatment capacity by 100 times, shortened the basic complete mixing time by 0.85 times, which proves the potential of microfluidic field strategy in enhancement and scale-up of liquid-liquid homogeneous chemical process.
基金supported by the National Natural Science Foundation of China(11072046,10672033,90715011 and 11102036)the National Basic Research and Development Program(973Program,2010CB731502)
文摘The fine-scale heterogeneity of granular material is characterized by its polydisperse microstructure with randomness and no periodicity. To predict the mechanical response of the material as the microstructure evolves, it is demonstrated to develop computational multiscale methods using discrete particle assembly-Cosserat continuum modeling in micro- and macro- scales, respectively. The computational homogenization method and the bridge scale method along the concurrent scale linking approach are briefly introduced. Based on the weak form of the Hu-Washizu variational principle, the mixed finite element procedure of gradient Cosserat continuum in the frame of the second-order homogenization scheme is developed. The meso-mechanically informed anisotropic damage of effective Cosserat continuum is characterized and identified and the microscopic mechanisms of macroscopic damage phenomenon are revealed.
