Results of numerical calcultions for viscous incompressible laminar flow over a rearwardfacing step on circular cylinder are presented. The domainsubdividing and matching method and the simplify SOLA solution are enga...Results of numerical calcultions for viscous incompressible laminar flow over a rearwardfacing step on circular cylinder are presented. The domainsubdividing and matching method and the simplify SOLA solution are engaged in the simulation. The effects of the step’s height,installed position and the Reynolds number on the flow field are obtained and discussed.展开更多
An experimental investigation on the flow past a circular cylinder in the range ofReynolds number 104 to 8 x 104 described in present paper. The results indicated that,as Reynolds number increasing in the sub-critical...An experimental investigation on the flow past a circular cylinder in the range ofReynolds number 104 to 8 x 104 described in present paper. The results indicated that,as Reynolds number increasing in the sub-critical flow, the separated poin*ts and the totaldrag were nearly constant, but the local mean-pressure distributions varied, especially theposition of the minimum local pressure θP min so Pushed forward, that the relationship couldbe shown as:θPmin Re0.05965 = 2.展开更多
A numerical simulation of the interaction between laminar flow with low Reynolds number and a highly flexible elastic sheet is presented. The mathematical model for the simulation includes a three-dimensional finitevo...A numerical simulation of the interaction between laminar flow with low Reynolds number and a highly flexible elastic sheet is presented. The mathematical model for the simulation includes a three-dimensional finitevolume based fluid solver for incompressible viscous flow and a combined finite-discrete element method for the three-dimensional deformation of solid. An immersed boundary method is used to couple the simulation of fluid and solid. It is implemented through a set of immersed boundary points scattered on the solid surface. These points provide a deformable solid wall boundary for the fluid by adding body force to Navier-Stokes equations. The force from the fluid is also obtained for each point and then applied on the boundary nodes of the solid. The vortex-induced vibration of the highly flexible elastic sheet is simulated with the established mathematical model. The simulated results for both swing pattern and oscillation frequency of the elastic sheet in low Reynolds number flow agree well with experimental data.展开更多
文摘Results of numerical calcultions for viscous incompressible laminar flow over a rearwardfacing step on circular cylinder are presented. The domainsubdividing and matching method and the simplify SOLA solution are engaged in the simulation. The effects of the step’s height,installed position and the Reynolds number on the flow field are obtained and discussed.
文摘An experimental investigation on the flow past a circular cylinder in the range ofReynolds number 104 to 8 x 104 described in present paper. The results indicated that,as Reynolds number increasing in the sub-critical flow, the separated poin*ts and the totaldrag were nearly constant, but the local mean-pressure distributions varied, especially theposition of the minimum local pressure θP min so Pushed forward, that the relationship couldbe shown as:θPmin Re0.05965 = 2.
基金Supported by Marie Curie International Incoming Fellowship (No. PIIF-GA-2009-253453)
文摘A numerical simulation of the interaction between laminar flow with low Reynolds number and a highly flexible elastic sheet is presented. The mathematical model for the simulation includes a three-dimensional finitevolume based fluid solver for incompressible viscous flow and a combined finite-discrete element method for the three-dimensional deformation of solid. An immersed boundary method is used to couple the simulation of fluid and solid. It is implemented through a set of immersed boundary points scattered on the solid surface. These points provide a deformable solid wall boundary for the fluid by adding body force to Navier-Stokes equations. The force from the fluid is also obtained for each point and then applied on the boundary nodes of the solid. The vortex-induced vibration of the highly flexible elastic sheet is simulated with the established mathematical model. The simulated results for both swing pattern and oscillation frequency of the elastic sheet in low Reynolds number flow agree well with experimental data.
