The National Congress on Fluid Mechanics of China was first held in Shanghai in 1963, and thereafter it was held in Wuxi (1979), Changsha (1985), Beijing (1989 and 1995), and Shanghai (2001), respectively. In recent years, under the initiative of the Fluid Mechanics Committee of Chinese Society of Theoretical and Applied Mechanics, the National Congress on Fluid Mechanics was relaunched every two years. The congress was successfully held in Guilin (2012), and later in Lanzhou (2014) and Nanjing (2016). The congress gathers people from all the fields in theoretical and applied fluid mechanics, including well-known scholars from all over the world, as well as doctoral and postgraduate students. Young scholars have become the major part of the participants. The congress creates learning and communication opportunities for them, and plays an active role in cultivating outstanding young talents in theoretical and applied fluid mechanics.
The 10th National Congress on Fluid Mechanics of China was held in Hangzhou on October 25–28, 2018; it was jointly co-organized by Zhejiang University, China Jiliang University, and the Zhejiang Provincial Society of Theoretical and Applied Mechanics. The congress included keynote speeches and parallel sessions, and it covered important directions of fluid mechanics, including turbulence and stability, multiphase flow, non-Newtonian fluid mechanics, hydrodynamics, experimental fluid mechanics, computational fluid dynamics, industrial fluid mechanics, flow in porous media, micro- and nanofluidics, high-temperature gas dynamics, and magneto hydrodynamics. More than 800 people participated in this congress, and around 600 presentations were given. The keynote speeches were given by Professor Shiyi Chen of South University of Science and Technology, China, Professor A. Jeffrey Giacomin of Queen’s University, Canada, Professor Steven L. Ceccio of University of Michigan, United States of America, Professor Zonglin Jiang of Institute of Mechanics, Chinese Academy of Science, China, and Professor Jianzhong Lin of Zhejiang University, China.
This special topic contains representative papers presented in the 10th National Congress on Fluid Mechanics of China, which were selected by the scientific committee of the congress. In the session of turbulence and stability, Xiong and Yang1 proposed a feasible method for constructing knotted vortex tubes with finite thickness and arbitrary complexity and developed an accurate algorithm to implement this method. Li et al.2 investigated the Richtmyer-Meshkov instability with reshock from a multimode planar interface using direct numerical simulation, and the temporal evolution and spatial distribution of the mean velocity, volume fraction of air, etc. were analyzed. In the multiphase flow session, Zhang et al.3 investigated the impact behavior between water drops and cylindrical superhydrophobic surfaces and two possible outcomes of drop impact were presented, i.e., asymmetric rebound and stretched breakup, depending on water drop velocity and cylinder size. In the non-Newtonian fluid mechanics session, Poungthong et al.4 derived a power series in the shear rate amplitude for the normal stress difference responses of a corotational Maxwell fluid in large-amplitude oscillatory shear flow. Cheng et al.5 conducted the direct numerical simulation of single plume flow in the thermal convection with polymers and reported that the heat transport ability was weakened by adding polymers. Yang and Peng6 developed a set of modified sharp interface methods consisting of the hybridized ghost fluid method, and the interactions between the shock waves and the inviscid, the Newtonian, and the shear-thinning liquid columns were simulated, respectively. In the session of hydrodynamics, Cheng et al.7 investigated the unsteady features of the cavitating flow past a sphere with a detached eddy simulation turbulence model and a transport equation cavitation model. In the session of flow in porous media, Li et al.8 presented their high-speed centrifugal experiments of conventional gas flooding based on rock samples of tight oil reservoirs in the buried hills of North China and an evaluation method of oil production potential in fractured porous media was established to quantitatively study the gas flooding potential of target reservoirs. Moreover, Li et al.9 reported a wind tunnel test of yaw oscillation for the airfoil dynamic “sweep effect” using “electronic cam” technology and synchronous acquisition of dynamic data in the session of industrial fluid mechanics. In the experimental fluid mechanics session, Shen et al.10 developed a high-speed microscopic experimental system and explored the effects of the microcavity trailing wall on the single-particle trapping behaviors. In the session of computational fluid dynamics, Nie and Xu11 carried out the large eddy simulation of the natural convection induced by a convectively heated vertical wall; the scales and flow structures were analyzed as well. Chen et al.12 implemented the cold flow analysis in a canonical supersonic combustor to study the low-frequency unsteadiness in an asymmetric separated flow field, and a three-dimensional Reynolds-averaged Navier–Stokes simulation was performed. Finally, in the session of micro- and nanofluidics, Li et al.13 theoretically investigated the temporal instability of coaxial liquid jets surrounded by a coflowing gas stream under the radial thermal field, and the effects of relevant process parameters on the jet instability were given by deriving the analytical dispersion relation for axisymmetric perturbations.
On behalf of the organizing committee, we wish to take this opportunity to thank the authors for their contribution to this special topic. We would like to thank the National Natural Science Foundation of China for the financial support. In particular, we wish to thank the American Institute of Physics and Professor A. Jeffrey Giacomin for the support to the congress and this special topic in Physics of Fluids.