Automatic mesh generation for rapid-response Navier-Stokes calculations

Leatham, M.; Stokes, S.; Shaw, J. A.; Cooper, J. A. G.; Appa, Jamil; Blaylock, T.

doi:10.2514/6.2000-2247

Cited by 60 publications

(26 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To address this shortcoming, several researchers [24,25,26] have considered the possibility of using other element types to improve mesh quality based on the concept of topological adaptivity. In a topologically adaptive mesh, cells are used that are locally appropriate to the region being discretized.…”

Section: Motivationmentioning

confidence: 99%

“…Leatham et al [25] employed edge collapse and edge refinement to achieve smooth transition. Their approach utilized non-face matching, i.e., a face of one element need not be coincident with a face in the adjacent element.…”

Section: Motivationmentioning

confidence: 99%

“…Additionally, the transition between the extruded mesh and the tetrahedral mesh will be poor. The solution to this problem, proposed here and elsewhere [24,25,26], is to employ a change in the local element topology. Edge collapse, as shown in figure 3.1(b), stops the generation of poor quality elements and provides the opportunity to extrude further into the domain.…”

Section: Mesh Quality Improvement Strategymentioning

confidence: 99%

See 2 more Smart Citations

Quality improvements in extruded meshes using topologically adaptive generalized elements

Chalasani

Thompson

2004

Numerical Meth Engineering

View full text Add to dashboard Cite

In this dissertation, a novel method to extrude near-body meshes from surface meshes of arbitrary topology that exploits topologically adaptive generalized elements to improve mesh quality is presented. Specifically, an advancing layer algorithm to generate nearbody meshes which are appropriate for viscous fluid flows is discussed. First, an orthogonal two-layer algebraic reference mesh is generated. The reference mesh is then smoothed using a locally three-dimensional Poisson-type mesh generation equation that is generalized to smooth extruded meshes of arbitrary surface topology. Local quality improvement operations such as edge collapse, face refinement, and local reconnection are performed in each layer to drive the mesh toward isotropy. An automatic marching thickness reduction algorithm is used to extrude from multiple geometries in close proximity. A global face refinement algorithm is used to improve the transition from the extruded mesh to the void-filling tetrahedral mesh. A few example meshes along with quality plots are presented to demonstrate the efficacy of the algorithms developed. ACKNOWLEDGMENTSThe author wishes to express his sincere appreciation to Dr. David S. Thompson, who acted as a major advisor and the director of my dissertation. His constant support and encouragement has given me an opportunity to learn, and grow professionally. I am indebted for his suggestions and guidance through out the dissertation work. It is hard to find enough words to express my appreciation for his patience shown towards me in many issues and guiding me to go in proper direction.I want to thank my committee members Dr.

show abstract

Section: Motivationmentioning

confidence: 99%

Section: Motivationmentioning

confidence: 99%

Section: Mesh Quality Improvement Strategymentioning

confidence: 99%

See 1 more Smart Citation

Quality improvements in extruded meshes using topologically adaptive generalized elements

Chalasani

Thompson

2004

Numerical Meth Engineering

View full text Add to dashboard Cite

show abstract

“…One application of general elements that has received interest in the literature is their use locally in extruded meshes to improve quality [4][5][6][7]. Such an extruded mesh is typically employed as the near-body component of a hybrid mesh [8,9] near viscous boundaries.…”

Section: Introductionmentioning

confidence: 99%

On the use of general elements in fluid dynamics simulations

Chalasani

Senguttuvan

Thompson

et al. 2007

Commun. Numer. Meth. Engng.

View full text Add to dashboard Cite

SUMMARYAs flow solvers have become more sophisticated, many now have the capability to handle meshes with general polyhedral elements, i.e. general elements. In response, researchers have begun to develop mesh generation strategies that exploit nonstandard element types. General elements have been employed locally in near-body extruded meshes to improve mesh quality and have also been used in solution adaptive mesh refinement algorithms. In this paper, we present two mesh generation strategies that employ general elements. We also discuss how a specific flow solver is formulated to work with general elements. We demonstrate our approach by presenting simulation results for two realistic configurations. We close with a discussion that highlights future research directions.

show abstract

“…The remainder of this paper discusses and demonstrates the algorithms developed within this overall surface and volume mesh generation strategy [22]. Following a description of the user-input to the grid generation process in Section 2, the generation of quadrilateral surface grids is described in Section 3.…”

Section: Introductionmentioning

confidence: 99%

The rapid and robust generation of efficient hybrid grids for rans simulations over complete aircraft

Shaw

Stokes

Lucking

2003

Numerical Methods in Fluids

Self Cite

View full text Add to dashboard Cite

SUMMARYA description is given of a method capable of automatically forming e cient, high-quality hybrid meshes for viscous ow calculations over complete aircraft, given engineers' requirements on mesh density and ÿrst cell-height. Mixed quadrilateral=triangular surface grids are constructed using the moving-front approach, with point placement and connection optimized to ensure high-quality, anisotropic panels are generated. The volume mesh is built in two stages. A near ÿeld mesh is formed using the advancinglayer approach, signiÿcantly enhanced through the use of mesh enriching=collapsing techniques and layer-intersection detection=front-termination algorithms. The remainder of the domain is then covered by a cut-cell Cartesian mesh of varying density that conforms to the outer-surface of the near ÿeld mesh. Examples of meshes generated using the described methods are presented and the user-input discussed.

show abstract

Automatic mesh generation for rapid-response Navier-Stokes calculations

Cited by 60 publications

References 8 publications

Quality improvements in extruded meshes using topologically adaptive generalized elements

Quality improvements in extruded meshes using topologically adaptive generalized elements

On the use of general elements in fluid dynamics simulations

The rapid and robust generation of efficient hybrid grids for rans simulations over complete aircraft

Contact Info

Product

Resources

About