A three-dimensional adaptive grid method

Nakahashi, K.; Deiwert, George S.

doi:10.2514/6.1985-486

Cited by 22 publications

(21 citation statements)

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“…In this work, when the boundary is moved or rotated the grid of computational domain is adjusted with boundary motion by using spring-analysis [19]. Applying this method effectively reduces the computational running time needed to find the solution.…”

Section: Mesh Analysis and Multi-zone Adaptive Gridsmentioning

confidence: 98%

Lift characteristics of pitching NACA0015 airfoil due to unsteady forced surface inflation

Heydari

Pasandideh‐Fard

2015

J Mech Sci Technol

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The purpose of this work is to investigate the unsteady forced surface inflating (UFSI) effect on lift coefficient of a pitching airfoil. Thus, 2D unsteady compressible flow around a pitching airfoil is analyzed by means of coarse grid CFD (CGCFD) method and spring dynamic grids network. At first to validate the code for moving boundary cases, the predicted lift coefficient of pitching airfoil is compared with experiments. Simultaneously, the CGCFD results are compared with the RANS simulation. Then UFSI is added to the pitching airfoil. The effects of unsteady parameters such as the inflation amplitude and phase difference between pitching and inflation is investigated on lift and pressure coefficients of pitching airfoil. According to the results, UFSI, with zero degree phase difference between pitching and inflation, help to postpone the dynamic stall.

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Section: Mesh Analysis and Multi-zone Adaptive Gridsmentioning

confidence: 98%

Lift characteristics of pitching NACA0015 airfoil due to unsteady forced surface inflation

Heydari

Pasandideh‐Fard

2015

J Mech Sci Technol

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“…While a number of 1D and 2D moving mesh methods have been developed in the last 20 years, such as those in [2,[4][5][6][7][8]20,21], few have been applied in three spatial dimensions [6,22,26]. Two and three dimensional adaptive Phase-field simulations have been implemented before but often in the finite difference and finite element contexts [23][24][25].…”

Section: Three Dimensional Implementationmentioning

confidence: 99%

Spectral implementation of an adaptive moving mesh method for phase-field equations

Feng

et al. 2006

Journal of Computational Physics

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“…To do this, the direct method has been employed. This method is based on a tension and torsion spring analogy, which have been suggested by Nakahashi and Diewert [2,3]. In this scheme, the grid points are imagined to be suspended by tension and torsion springs and optimally redistributed by minimizing the energy of the springs system.…”

Section: Two-dimensional Adaptation Problemmentioning

confidence: 99%

Combination of adaptive‐grid redistribution and embedding methods

Ameri

Shirani

2004

Commun. Numer. Meth. Engng.

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SUMMARYThe redistribution and embedding are two main adaptive-grid methods. With use of initial structured grid, it is possible to combine these adaptive-grid techniques. It means that before the grid becomes unstructured, we employ redistribution technique and then use embedding method. It is used to solve three model problems, transonic and supersonic inviscid ows in channels with circular arc bump and with convergent part. The Euler equations are integrated to steady state by an explicit, ÿnite volume, Ni's Lax-Wendro type. The combination of adaptive-grid redistribution and embedding is complex, but it is shown in this paper that it is very e cient and worth to use it in large CPU time consuming problems. The results also show that the combination requires less grid points and therefore less memory space for prescribed accuracy.

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A three-dimensional adaptive grid method

Cited by 22 publications

References 0 publications

Lift characteristics of pitching NACA0015 airfoil due to unsteady forced surface inflation

Lift characteristics of pitching NACA0015 airfoil due to unsteady forced surface inflation

Spectral implementation of an adaptive moving mesh method for phase-field equations

Combination of adaptive‐grid redistribution and embedding methods

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