High order isoparametric elements in boundary element method—Smooth elliptical element

2019 ◽  
Vol 101 ◽  
pp. 37-47
Author(s):  
Hang Ma ◽  
Yu Tian ◽  
Donghong He
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
High Order ◽  
Element Method ◽  
Isoparametric Elements

Explicit Kutta condition for unsteady two-dimensional high-order potential boundary element method

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 1080-1081
Author(s):  
Giuseppe Davi ◽  
Rosario M. A. Maretta ◽  
Alberto Milazzo
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
High Order ◽  
Two Dimensional ◽  
Kutta Condition ◽  
Element Method

Verification, Validation, and Best Practices for a High-Order, Potential-Flow Boundary Element Method

2015 ◽  
Author(s):  
W. James Doyle ◽  
Lauren S. Schambach ◽  
Marc V. Smith ◽  
Charles Field ◽  
Christopher J. Hart
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Potential Flow ◽  
Best Practice ◽  
High Order ◽  
Data Sets ◽  
Design Environment ◽  
Best Practice Guidelines ◽  
Physical Experiments ◽  
Element Method

Aegir is a medium-fidelity potential flow code that uses a high-order, non-uniform rational B-Spline (NURBS) based boundary-element method for the computation of steady and unsteady ship hydrodynamics. This paper documents verification and validation for Aegir in its steady-state wave resistance prediction mode and Aegir’s LEAPS to Aegir function. A set of best practice guidelines has been created to aid the user in selecting initial input parameters, which reduces the necessary time for verification. This paper also presents validation of the numerical solution versus physical experiments from publically available ship data sets. Aegir has become more prevalent in the naval ship design community and is now a part of the US Navy’s Integrated Hydrodynamic Design Environment (IHDE).

Explicit Kutta Condition for Unsteady Two-Dimensional High-Order Potential Boundary Element Method

AIAA Journal ◽  
10.2514/2.197 ◽  
1997 ◽  
Vol 35 (6) ◽  
pp. 1080-1081 ◽  
Author(s):  
Giuseppe Davi ◽  
Rosario M. A. Marretta ◽  
Alberto Milazzo
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
High Order ◽  
Two Dimensional ◽  
Kutta Condition ◽  
Element Method

Influence of Free Surface on Hydrodynamic Lift Using a High-Order Boundary Element Method

2015 ◽  
Author(s):  
Amanda J. Costa ◽  
Daniel Kowalyshyn ◽  
Kevin Tuil ◽  
Yin Lu Young ◽  
William Milewski ◽  
...  
Keyword(s):  
Free Surface ◽  
Boundary Element Method ◽  
Boundary Element ◽  
High Order ◽  
Linear Potential ◽  
Surface Boundary ◽  
Ship Hulls ◽  
Surface Boundary Conditions ◽  
Linear Potential Theory ◽  
Element Method

This paper presents the results of hydrofoil simulations at varying depths below the free surface, in surface piercing conditions, and integrated with ship hulls. It focuses on the influence of the free surface on the hydrodynamic loads, susceptibility to cavitation, and resulting surface wave patterns. A fast, high-order, NURBS (Non Uniform Rational B-Spline) based boundary element method has been developed that includes both free surface boundary conditions and steady and unsteady iterative pressure Kutta conditions for simulating lift. Results from this method will be compared to published experimental results, analytical solutions based on linear potential theory, and numerical results from viscous simulations obtained using the commercial CFD solver, ANSYS CFX.

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