A robust weakly compressible SPH method and its comparison with an incompressible SPH

Abstract : This paper presents a comparative study for the weakly compressible (WCSPH) and incompressible (ISPH) smoothed particle hydrodynamics methods by providing numerical solutions for fluid flows over an airfoil and a square obstacle. Improved WCSPH and ISPH techniques are used to solve these two bluff body flow problems. It is shown that both approaches can handle complex geometries using the multiple boundary tangents (MBT) method, and eliminate particle clustering-induced instabilities with the implementation of a particle fracture repair procedure as well as the corrected SPH discretization scheme. WCSPH and ISPH simulation results are compared and validated with those of a finite element method (FEM). The quantitative comparisons of WCSPH, ISPH and FEM results in terms of Strouhal number for the square obstacle test case, and the pressure envelope, surface traction forces, and velocity gradients on the airfoil boundaries as well as the lift and drag values for the airfoil geometry indicate that the WCSPH method with the suggested implementation produces numerical results as accurate and reliable as those of the ISPH and FEM methods. © 2011 John Wiley & Sons, Ltd.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-02127872
Contributor : Mostafa Safdari Shadloo <>
Submitted on : Monday, May 13, 2019 - 5:39:26 PM
Last modification on : Monday, May 13, 2019 - 5:39:26 PM

Links full text

Identifiers

Citation

M.S. Shadloo, Amir Zainali, M. Yildiz, Afzal Suleman. A robust weakly compressible SPH method and its comparison with an incompressible SPH. International Journal for Numerical Methods in Engineering, 2012, 89 (8), pp.939-956. ⟨10.1002/nme.3267⟩. ⟨hal-02127872⟩

Share

Metrics

Record views

14