A5079692892- Fluid Dynamics and Thin Films
- Solidification and crystal growth phenomena
- Nonlinear Dynamics and Pattern Formation
- Spacecraft and Cryogenic Technologies
- Geological and Geochemical Analysis
- Fluid Dynamics Simulations and Interactions
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Fluid Dynamics and Heat Transfer
- Surface Modification and Superhydrophobicity
- Rocket and propulsion systems research
- Paleontology and Stratigraphy of Fossils
- Fluid Dynamics and Turbulent Flows
- Gamma-ray bursts and supernovae
- Plant Water Relations and Carbon Dynamics
- Aerodynamics and Fluid Dynamics Research
- Lattice Boltzmann Simulation Studies
- Combustion and flame dynamics
- Geology and Paleoclimatology Research
- Innovative Microfluidic and Catalytic Techniques Innovation
- Geophysics and Gravity Measurements
- Field-Flow Fractionation Techniques
- Cyclone Separators and Fluid Dynamics
- Geotechnical Engineering and Soil Stabilization
Institute of Mechanics
2017-2024
Chinese Academy of Sciences
2017-2024
University of Chinese Academy of Sciences
2017-2024
Hohai University
2014-2022
Shanghai Institute of Technical Physics
2021
The experimental study on thermocapillary convection in liquid bridges of large Prandtl number has been carried out Tiangong-2 space. purpose these experiments is to the oscillation instability convection, and discover recognize mechanism destabilization microgravity environment In this paper, geometry a half-floating-zone bridge featured by aspect ratio Ar volume Vr , its influence critical conditions oscillatory studied. More than 700 sets space have finished. characteristics – parameter...
It is of great significance for fluid management under microgravity to explore the morphological characteristics annular bubbles in a tank with central column. The propellant residue can be evaluated by measuring bubble's volume, and estimation mass center tanks also needs know liquid distribution. An experiment cabin designed experiments filling emptying model are carried out aboard Chinese Space Station. Two kinds surrounding column observed experimentally first time, which appear during...
Thermocapillary convection has always been one of the most important research topics in microgravity fluid physics. A space experimental study on thermocapillary an open annular liquid pool – a typical flow system conducted SJ-10 satellite China. This experiment observed spatial temperature distribution free surface using infrared thermal imager, obtained pattern transition process, analysed oscillation characteristics and revealed instability mechanism themocapillary convection. The shape...
We carried out space experiments on thermocapillary convection in liquid bridges with large Prandtl number the Tiangong-2 laboratory, studying influence of geometrical parameters, including aspect ratio (Ar, height to diameter) and volume (Vr). It is found that there are two modes temperature oscillation bridges: low- high-frequency oscillation, corresponding different critical difference respectively. In this paper, effect wave pattern its transformation oscillating flow studied detail....
The recently explored inactive Tianzuo hydrothermal field, in the amagmatic segment of ultraslow-spreading Southwest Indian Ridge (SWIR), is closely associated with detachment faults. In this site, sulfide minerals are hosted by serpentine-bearing ultramafic rocks and include high-temperature (isocubanite, sphalerite, minor pyrrhotite) low-temperature (pyrite I, marcasite, pyrite II, covellite) phases. study, trace-element concentrations isocubanite II were used to elucidate mineralization...
We studied the evolution of flow structures and large-scale circulations (LSC) in Rayleigh–Bénard convection (RBC) using liquid carbon dioxide as working medium. In this experiment, a transparent sapphire pressure vessel with observable internal was designed, different temperature differences were applied between upper lower surfaces fluid to obtain Rayleigh numbers (Ra). employed proper orthogonal decomposition reconstruction extract from shadowgraphy images. used optical techniques acquire...
In this paper, the coupling effect of multiphysical fields droplet migration is deeply studied by constructing a physical model with fields. Digital holographic interferometry and particle image velocimetry are used to simultaneously measure temperature velocity mother liquor in process for first time. Due advancements measuring, zero-velocity region also where thermal wake appears, four vortexes appear off-axis behavior double-droplet found. The aim work analyze relationship fields, so as...
To cooperate with Chinese TG-2 space experiment project, the transition process from steady to regular oscillatory flow, and finally chaos is experimentally studied in buoyant-thermocapillary convection.The onset of oscillation further transitional convective behavior are detected by measuring temperature large-scale liquid bridge 2cSt silicone oil.To identify various dynamical regimes, Fourier transform fractal theory used reveal frequency amplitude characteristics flow motion.The...
Abundant iron deposits characterized by stratified orebodies have recently been discovered in the Taxkorgan Terrane, West Kunlun Orogenic Belt, China. Of these deposits, Zankan deposit was first to be and has largest estimated tonnage. However, mineralization types for this others area are uncertain, mainly because of apparent conflict between their typical banded architecture Cambrian ages. In study, situ sulfur isotopic trace‐element compositions pyrite, including that coexisting with...
Abstract The Huangshaping deposit is unique in southern Hunan Province, China, as it hosts economic reserves of both W–Mo and Pb–Zn mineralization, which are usually associated with granite granodiorite porphyry this area, respectively. This study reports results situ LA-MC-ICP-MS sulphur isotopic composition analyses conducted on sulphides from mineralization the aim constraining ore genesis for deposit. All samples proximal have relatively uniform high δ 34 S values (8.7 ‰ to 16.0 ‰),...
Abstract Propellant tanks provide non-entrained propellant for thrusters of satellites, which plays an important role in space mission. And the fluid transfer efficiency is key to supply propellant. An experiment cabin containing two different scaled tank models are designed and experiments liquid reorientation under microgravity carried out Chinese Space Station. Experiment results present high transportation kinds management devices. Finite element established verified by simulation...
In most space shuttle fuel tanks, a central column is used to secure the Propellant Management Devices. This study focuses on distribution of fluids in such tanks. Microgravity experiments are conducted Chinese Space Station, and annular bubbles surrounding have been observed for first time. An in-depth carried out profile these using perturbation methods Young–Laplace equation. Theoretical values gas–liquid interface morphology under different gravity levels obtained compared with numerical...
Spray cooling is an effective solution for high heat flux dissipation challenges. Accurate prediction of transfer efficiency by numerical simulation can reduce the cost spray in engineering applications. To improve accuracy simulation, this study develops a mathematical model droplet collision and response based on experimental data. In experiments, droplets are sprayed onto 200 °C aluminum alloy thermal wall using atomizing nozzle, temperature monitored, curve variation during estimated...
Cross-zero expansion coefficient Rayleigh–Bénard–Marangoni (CRBM) convection refers to the convective phenomenon where thermal with stratified positive and negative coefficients in a liquid layer is coupled Marangoni convection. In Bénard convection, fluids cross-zero contain neutral (α) zero, local buoyancy-driven leading unique flow instability phenomena. This paper uses linear stability theory analyze CRBM horizontal under vertical temperature gradient performs numerical calculations for...
This paper provides a detailed description of the development and experimental results supercritical flow experiment payload carried on TZ-6 cargo spacecraft, as well systematic verification out-of-cabin deployment experiment. The technical engineering indicators are analyzed, functional modules shown. design, installation location, size, weight, temperature, illumination, pressure, radiation, control, command reception, telemetry data, downlink procedures for in extreme conditions space....
By leveraging the high dimensional nonlinear mapping capabilities of artificial neural networks in conjunction with powerful control mechanisms reinforcement learning, we attain real-time, precise modulation synthetic jet flow rates over elliptical cylinders varying aspect ratios (Ar). The training outcomes for a blockage ratio 0.24 show that Ar=1 and 0.75, reward function gradually increases decreasing oscillations before stabilizing. agent's strategy achieved drag reduction 8% 15%, while...
The annular flow payload is among the first batch of space science experimental projects carried out on Fluid Physics Rack China Space Station. This paper provides a detailed introduction to development payload, ground validation, and in orbit experiments. sized 320 mm × 200 220 mm, includes an model supports supply (24 V, 12 5 V), communication, data transmission. A multi-functional heating column was designed, allowing for operate fixed, rotating, lifting scenarios. In round, 96 sets...
Thermocapillary convection is a common flow in space. Experiments regarding thermocapillary were previously carried out large-scale liquid bridge with diameter of 20 mm on the Tiangong-2 space station, and transition process to chaos was systematically studied. Under microgravity conditions, gravity greatly weakened, very slow. This allows for opportunity study bifurcation detail. It has been found that there are abundant nonlinear physical phenomena associated changing geometric parameters...
Abstract The development of space experiment payload for studying thermocapillary convection in the liquid bridge with large Pr number on TG-2 laboratory as well experiments are presented detail this paper, and objectives confirmed. functions analyzed, technical engineering specifications determined. Detailed designs experimental verifications performed structure columns, method bubble removing liquid, cleaning system, accurate control aspect ratio volume ratio, high-sensitivity measurement...