Simulating solid-fluid coupling with the classical meshless methods is an difficult issue due to lack of Kronecker delta property shape functions when enforcing essential boundary conditions. In this work, we present a novel staggered method overcome problem. We create set particles from original in each time step by mapping mass and momentum onto these particles, aiming stagger velocity field pressure field. Based on arrangement, new approximate projection proposed enforce divergence-free...

Abstract We propose a meshless method to simulate brittle fracture. For solids, stress computation can be difficult because materials generally require small timesteps which bring about heavy computational burden. Furthermore, treating the objects as deformable bodies will cause inevitable visual artifact. treat fully rigid and solve distribution with Meshless Local Petrov‐Galerkin quasistatic problem, so artifact disppears no timestep restriction exists. As framework, our has advantage of...

Composite beams could have complex cross sections composed of many layers with different materials and layup angles. The anisotropic heterogeneous features render three-dimensional (3D) finite element analysis (FEA) layer details computationally expensive. Smeared properties approaches are commonly used in analyzing such structures. Mechanics structure genome (MSG) can provide an efficient yet accurate alterative. Several composite studied to evaluate the smeared MSG. In comparison detailed...

This paper presents an accurate solution method for the static and vibration analysis of functionally graded Reissner‐Mindlin plate with general boundary conditions on basis improved Fourier series method. In theoretical formulations, governing equations elastic are obtained by using Hamilton’s principle. The components admissible displacement functions expanded as form which contains a 2D cosine auxiliary function in 1D series. major role is to remove potential discontinuities its...

Artemisia vulgaris (A. vulgaris) is an edible plant showing antioxidant and antibacterial effects, but its effect as a feed additive or forage source on the herbivore growth health unclear. This study aimed to investigate of A. meal supplementation performance, gut microbes, immune function in rabbits. A total 120 growing Rex rabbits were randomly allocated into 4 treatments with 6 replicates per 5 each. There four experimental diets containing at doses 0, 3.0, 6.0 9.0%, respectively. The...

Purpose As the demand for human–robot collaboration in manufacturing applications grows, necessity collision detection functions robots becomes increasingly paramount safety. Hence, this paper aims to improve existing method achieve efficient, accurate and sensitive robot detection. Design/methodology/approach The external torque is estimated by momentum observers based on dynamics model. Because state of joints more accessible distinguish under action suppression operator proposed paper,...

Abstract Tengizchevroil (TCO) operates two giant carbonate oil fields, Tengiz and Korolev, located on the northeast shore of Caspian Sea in Kazakhstan. Both fields are Middle Devonian to Upper Carboniferous isolated platforms. Since 1991, have produced around 2B barrels oil. As more geologic dynamic data becomes available, an updated history match existing field models is required provide accurate simulation results for estimating reserves, optimizing production assessing future development...

Based on the lumped mass method, a torsional vibration model of planetary gear system is established considering nonlinear factors such as friction, time-varying meshing stiffness, backlash, and comprehensive error. The Runge–Kutta numerical method used to analyze motion characteristics with various parameters influence tooth friction bifurcation chaos system. simulation results show that has rich behavior excitation frequency, damping ratio, error amplitude, load experiences multiple...

Applied the finite volume method combining two-equations turbulence model,the influence of fluid dynamic characteristics on XCP probe under different factors be studied The were researched influencing factors, such as falling speed, rotating rate,seawater density,etc. drag coefficient speeds and limited velocity submarine steady motion obtained. Compared with experimental results, simulated results agree well experiments have show validity feasibility numerical analysis method. These will...

Abstract A high condesate saturation ring usually forms in a gas condensate reservoir where pressure decreases below the dew point, especially around wellbore. Gas injection/cycling is main recovery process of choice for preventing loss valuable liquids. In this often maintained above point. Although full maintenance development seems ideal terms liquid loss, economic reasons, may not be profitable. recent years, many reservoirs discovered have very point pressures, say 50MPa, case will...

Effective medium methods for the attribution of micro-structures to macro elastic properties shales are important prediction sweet spots in shalegas production.With X-ray micro-computed tomography (XMCT), shale core samples from Longmaxi Formation visualized and characterized by 3D digital images.As an efficient alternative conventional effective estimating properties, we propose a consistent workflow lattice spring modeling (LSM) emulate cores using three types lattices.Particular attention...

Missing values in data series is a common problem many research and applications. Most of existing interpolation methods are based on spatial or temporal interpolation, without considering the spatiotemporal correlation observation data, resulting poor effect. In this paper, Modified Spatiotemporal Mixed-Effects (MSTME) model for proposed. Experiments with simulated real SCIGN performed to assess validity proposed comparison Kriged Kalman Filter (KKF) (STME) model. The average improvements...

In marine engineering, fluid–structure interaction (FSI) problems caused by wave impact are prevalent and often accompanied violent free-surface changes. To accurately capture the optimize solution strategy for FSI problems, this study proposes a solver (overInterISODyMFoam) that combines isoAdvector overset refined capturing partitioned approach couples finite volume modal superposition (FVMS) based on preCICE platform solving problems. The performance of FVMS method verified comparing them...

Deeply buried polyhalite is a kind of sulfate which contains about 28% potassium sulfate. Extraction from using in-situ leaching technology can help to resolve the problem shortage. This paper indicates modeling study in laboratory. Using CaCl2 as lixiviant, effect concentration granularity mineral, infiltration velocity and length route are studied by analyzing solution. The experiment results show that mineral one most influencing factors recovery K+. When changed 2-3 mm 5-8 mm, K+...

Natural fractured rocks usually contain background granular media and multi-scale fractures. The coordination number is a crucial factor to characterize the connection of microstructural elements. determination numbers for modeling essential interpret distribution cracks related micromechanical properties. We have built consistent workflow discrete element models (DEMs) coupled with fracture networks (DFNs). This DEM-DFN model could provide simple formulation high calculation efficiency more...