We present a new method to create and preserve the turbulent details generated around moving objects in SPH fluid. In our approach, a high-resolution overlapping grid is bounded to each object and translates with the object. The turbulence formation is modeled by resolving the local flow around objects using a hybrid SPH-FLIP method. Then these vortical details are carried on SPH particles flow...

Abstract We present a new methodology for simulating self-gravitating general-relativistic fluids. In our approach the fluid is modelled by means of Lagrangian particles in framework (GR) smoothed particle hydrodynamics (SPH) formulation, while spacetime evolved on mesh according to Baumgarte–Shapiro–Shibata–Nakamura (BSSN) formulation that also frequently used Eulerian GR-hydrodynamics. To bes...

Fluid shear stress modulates the functional responses of platelets and vascular cells, and plays an important role in the pathogenesis of vascular disorders, including atherosclerosis and restenosis. Since shear stress induces activation of platelets, which abundantly store sphingosine 1-phosphate (Sph-1-P), and upregulates the mRNA expression of S1P(1), the most important Sph-1-P receptor expr...

In this paper we present two enhanced variants of the smoothed particle hydrodynamics (SPH) method for the numerical simulation of free surface flows of viscous fluids. Improvements are achieved by deriving a new set of general discrete SPH-like equations under an energy-based framework and applying a corrected (high-order) or coupled particle approximation scheme for function derivatives. By d...

A novel SPH model aimed at solving the coupled water-soil problems is proposed based on mixture theory. This method featured with spatially overlapped dual continua for both fluid and solid phases. The water phase modeled as a weakly-compressible Newtonian fluid, soil using an elastoplastic constitutive model. benchmark problem, fully submerged subjected to gravity , examined validate this Fina...

A new use of smoothed particle hydrodynamics (SPH) in fluid simulation is presented: an algorithm solving the Helmholtz-Hodge decomposition using SPH in order to find the null divergence velocity field for incompressible flow simulation. Accordingly, a new version of the Laplacian for a vector field is proposed here. In order to improve the accuracy of the SPH technique, the paper also presents...

OBJECTIVE Almost all small animal SPECT is performed with pinhole collimators (PH), including single-PH (SPH) and multi-PH (MPH). In the clinical study, not only PH but also parallel-hole collimator (PAH) is often used in planar and SPECT imaging. However, there have been no comparative studies on image quality with various collimators on the small animal imaging. This study compared the basic ...

The present work addresses the need for an efficient, versatile, accurate and open-source numerical tool to be used during design stage of wave energy converters (WECs). device considered here is heaving point-absorber developed tested by Sandia National Laboratories. smoothed particle hydrodynamics (SPH) method, as implemented in DualSPHysics, proposed since its meshless approach presents some...