As a new type of hull form,trimaran has remarkable excellent performances and has drawn more and more attention.When the viscous CFD technology now available is applied to the research of resistance performance of tri...As a new type of hull form,trimaran has remarkable excellent performances and has drawn more and more attention.When the viscous CFD technology now available is applied to the research of resistance performance of trimaran,the spatial discretization would usually result in the grid error and uncertainty,and thus the considerable discrepancy between the numerical results and the experimental data.In order to ascertain how much the grid would affect the calculation,the grid convergence should be studied.A mathematical trimaran was chosen as an example,with the commercial code CFX for the simulation,VOF for surface treatment,and the grid study was carried out based on two different turbulence models.It was concluded that carrying out grid study is helpful in estimating the grid error and uncertainty,and indicating the direction of improving the credibility of the numerical calculation, and,in addition to grid errors and uncertainties,the turbulence modeling errors and uncertainties contribute to the simulation errors.展开更多
Digital humanities has grown and changed over the years; we have moved away from expecting technology to be a tool to make humanities research easier and faster into one where we are now equal partners. Our collaborat...Digital humanities has grown and changed over the years; we have moved away from expecting technology to be a tool to make humanities research easier and faster into one where we are now equal partners. Our collaborative projects drive forward the research agendas of both humanists and technologists. There have been other changes too. The focus of our scholarly interest has moved away from its historical origins in text-based scholarship, although that now has many more possibilities, and we are seeing an interest in exploring culture and heritage more widely. Where the progress is slower is in our moves towards openness and inclusivity, and this is to some extent hampered by a lack of linguistic diversity. This is being addressed with specialist groups within the major DH organizations on a national and a global level. DH has grown rapidly in China, and the anglophone world could do more to engage with practitioners and potential colleagues in this new vibrant and emerging area. There are certainly Western centres that specialize, particularly in Chinese texts and historical documents, but this needs to be extended further if we are not to impose limits on the conversations, synergies and collaborations that can result.展开更多
文摘As a new type of hull form,trimaran has remarkable excellent performances and has drawn more and more attention.When the viscous CFD technology now available is applied to the research of resistance performance of trimaran,the spatial discretization would usually result in the grid error and uncertainty,and thus the considerable discrepancy between the numerical results and the experimental data.In order to ascertain how much the grid would affect the calculation,the grid convergence should be studied.A mathematical trimaran was chosen as an example,with the commercial code CFX for the simulation,VOF for surface treatment,and the grid study was carried out based on two different turbulence models.It was concluded that carrying out grid study is helpful in estimating the grid error and uncertainty,and indicating the direction of improving the credibility of the numerical calculation, and,in addition to grid errors and uncertainties,the turbulence modeling errors and uncertainties contribute to the simulation errors.
文摘Digital humanities has grown and changed over the years; we have moved away from expecting technology to be a tool to make humanities research easier and faster into one where we are now equal partners. Our collaborative projects drive forward the research agendas of both humanists and technologists. There have been other changes too. The focus of our scholarly interest has moved away from its historical origins in text-based scholarship, although that now has many more possibilities, and we are seeing an interest in exploring culture and heritage more widely. Where the progress is slower is in our moves towards openness and inclusivity, and this is to some extent hampered by a lack of linguistic diversity. This is being addressed with specialist groups within the major DH organizations on a national and a global level. DH has grown rapidly in China, and the anglophone world could do more to engage with practitioners and potential colleagues in this new vibrant and emerging area. There are certainly Western centres that specialize, particularly in Chinese texts and historical documents, but this needs to be extended further if we are not to impose limits on the conversations, synergies and collaborations that can result.
