3D extension of the particle-attached element interpolation in Smoothed Particle Hydrodynamics = 입자 부착 요소 보간을 이용한 SPH 밀도 보정의 3차원 확장

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 42
  • Download : 0
Random pressure and density oscillations in Smoothed Particle Hydrodynamics (SPH) often lead to degradation of numerical stability and accuracy of the entire simulation. Shepard filter is the most commonly used technique to alleviate such an issue, but the major problem with this method is that it is highly sensitive to the smoothing frequency and tends to over-smooth the density field when applied too frequently. To overcome this problem, a new density correction method was proposed by Seo for 2D problems, where density of each particle is reinitialized using particle-attached element and the corresponding shape functions. As an extension to his work, this paper presents a 3D implementation of the new density correction method. Similar to the 2D method which uses a 4-node square element, a 8-node cubic element with linear shape functions are employed for interpolation of the density field within the smoothing domain. Variable smoothing domain size is selected for each particle in each smoothing step, which enables the simulation to avoid over-smoothing and have converged solutions regardless of the smoothing frequency. The major portion of the calculation is carried out using a graphics processing unit (GPU) for faster simulation and three benchmark problems are solved to verify the feasibility of the method in 3D.
Advisors
Lee, Phill-Seungresearcher이필승researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2020
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2020.8,[iv, 39 p. :]

Keywords

Smoothed Particle Hydrodynamics▼aDensity correction▼aFluid dynamics▼a3D sloshing▼a3D dam-break▼aGPU computing; SPH▼a밀도 보정▼a유체역학▼a3차원 슬로싱▼a3차원 댐 붕괴▼aGPU 컴퓨팅

URI
http://hdl.handle.net/10203/284945
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=925104&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0