Heat transfer and phase change in multiphase media involve complex behavior such as multi-physics coupling, unsteady interfaces, boundary generation/disappearance. The smoothed particle hydrodynamics (SPH) method is used to simulate multicomponent problems (initially solid material surrounded by a fluid) characterized heat transfer, solid–liquid change, flow. First, the interface of melted liquids ambient fluids are simulated SPH model, where corrected algorithms techniques adopted provide...

The process of concrete breaking by a high-speed water jet was simulated in this study based on the coupled method smoothed particle hydrodynamics and finite element method. Riedel–Hiermaier–Thoma constitutive model adopted to describe mechanical characteristics material. Various impact velocities (250–800 m/s) diameters (1.0–3.0 mm) were investigate effect incident parameters dynamic responses damage behaviors simulation results also verified water-jet experiments. show that can reproduce...

Simulation of surface erosion by impact abrasive water-jet (AWJ) is challenging for traditional mesh-based numerical methods, because it involves complex phenomena related to fluid–solid interaction, material removal and free flows. In this study, the mechanism ductile target materials AWJ investigated based on smoothed particle hydrodynamics method (SPH, a mesh-free method). The water-jet, abrasives solid are all discretized with series SPH particles. modeled as continuous fluid flow,...

We conducted an experimental study on the formation of cavity and splash crown during impact superhydrophobic hydrophilic spheres water polyethylene oxide solution (non-Newtonian liquid). investigated influences falling speed formation. In particular, we focused evolution time when with different contact angles fall into liquids under various speeds behavior curtain. Results show that sphere angle liquid viscosity have a great effect The increase in induces However, has certain inhibitory...

Aiming at the problems of performance fluctuation and unstable training edge-end devices during training, this paper proposes an adaptive federated learning device selection strategy based on prediction. The method aims to solve problem that traditional does not consider devices, which leads a large amount wasted arithmetic communication resources slow convergence speed. Specifically, establishes linear regression model overhead each resource by collecting historical data realize prediction...

Transparent objects are common in daily life, while their optical properties pose challenges for RGB-D cameras to capture accurate depth information. This issue is further amplified when these hand-held, as hand occlusions complicate estimation. For assistant robots, however, accurately perceiving hand-held transparent critical effective human-robot interaction. paper presents a Hand-Aware Depth Restoration (HADR) method based on creating an implicit neural representation function from...

The abrasive water-jet (AWJ) erosion process involves the complex interaction between fluid medium, particles and solid material, which brings great challenges to establishment of numerical model. Because traditional grid-based methods are not suitable for problems local deformation material removal, meshfree method smoothed particle hydrodynamics (SPH), based on unresolved coupling discrete element (DEM), is adopted establish model AWJ study. medium treated as a weakly compressible viscous...

Abstract The reliability of submersible motors is directly related to the operational life offshore oil-gas resources exploration and development equipment, crude oil production, drilling costs. Temperature field model coupling mode are key factors for accurate analysis cooling system. First, considering different equivalent modes convective heat transfer housing surface, two temperature models established using finite volume method (FVM). Second, influence magnetic field, between loss (HL)...

This paper propose genetic algorithm combined with neural networks, greatly improving the convergence rate of network aim at disadvantage traditional BP inversion method is easy to fall into local minimum and slow convergence.Finally, verified feasibility superiority above methods through successful initial ground stress actual project.

In this paper, considering the heat exchange between ends of stator&rotor and lubricating oil, internal flow field model is established to analyse state. The variation law pressure drops in friction loss rotor surface are specified. operation characteristic motor magnetic obtained through analysis field. Based on results field, temperature distribution obtained. Compared with result simulation which only air gap path considered, stator shows totally different law, increases from 32°C...

The computation domain of the temperature field submersible motor is numerically solved using finite volume method (FVM). Firstly, change law loss obtained by calculation. heat source analysis result applied as boundary condition magneto-thermal-flux coupling. Then, based on inlet variation which according to drop between and outlet, influence velocity analyzed. absolute error simulation results test 5%. importance considering explained experiments. distribution under local internal flow...

The settlement characteristics of storage tank foundation at water-filling preloading stage and stable loading was analyzed based on numerical simulation. And the influences soil parameters were studied. research results show that Uplift appears place 1.3D away from center oil bottom, final uplift value is 10mm.The main factor which consolidation speed permeability coefficient. determined by compression modulus load.

According to analyze the settlement characteristics of storage tank foundation at water-filling preloading stage and stable loading based on numerical simulation, researching foundation. The research results show that deformation is “tray” in shape, maximum appears place 0.65D away from center bottom, D radius tank. Uplift 1.3D oil final uplift value 10mm.The main factor which influences consolidation speed permeability coefficient.

The tourmaline-based composite materials as an effective thermal coating of heat exchanger unit were prepared from natural mineral tourmaline, transition metal oxides and carbon nanotubes. far infrared emission properties performance studied. results indicated that can be adjusted with the chemical composition materials, when mass percentage nanotubes is 10%, fractional 26.77% energy saving efficiency achieved.

This paper analyzes the settlement of storage tank group and characteristics with different loading methods. The result shows that deformation foundation is a tilted ‘hat’ in shape under influence effect ,and methods obviously degree plane tilt non-plane foundation.

This paper studies properties of concrete under the action water-reducing retarder and expansive agent; gives optimal design calculation method cooling water pipe in construction technology: mainly considering pipe’s diameter, distance, water’s flow, temperature, time etc; optimization to concretes method. Midas/Civil, one finite element analysis soft-ware, analyses mass whole process temperature field stress numerical simulation, admixtures technology. The results show that commonuse...