Multigroup Radiation Hydrodynamics with a High-Order–Low-Order Method

2017 ◽  
Vol 185 (1) ◽  
pp. 117-129 ◽  
Author(s):  
A. B. Wollaber ◽  
H. Park ◽  
R. B. Lowrie ◽  
R. M. Rauenzahn ◽  
M. A. Cleveland
Keyword(s):  
High Order ◽  
Radiation Hydrodynamics ◽  
Order Method ◽  
Low Order

scholarly journals Rad-Hydro with a High-Order, Low-Order Method

2015 ◽  
Author(s):  
Allan Benton Wollaber ◽  
HyeongKae Park ◽  
Robert Byron Lowrie ◽  
Rick M. Rauenzahn ◽  
Mathew Allen Cleveland
Keyword(s):  
High Order ◽  
Order Method ◽  
Low Order

scholarly journals A Stable 1D Multigroup High-Order Low-Order Method

2016 ◽  
Vol 46 (1) ◽  
pp. 46-76 ◽  
Author(s):  
B. C. Yee ◽  
A. B. Wollaber ◽  
T. S. Haut ◽  
H. Park
Keyword(s):  
High Order ◽  
Order Method ◽  
Low Order

Comparison of the Interface-Capturing Behavior between LSM and MCLS

2017 ◽  
Vol 730 ◽  
pp. 533-540
Author(s):  
Zhi Lin Liu ◽  
Yong Huang
Keyword(s):  
Level Set ◽  
Computing Time ◽  
High Order ◽  
Godunov Method ◽  
Order Method ◽  
Time Cost ◽  
Interface Capturing ◽  
Moving Interface ◽  
Topological Geometry ◽  
Low Order

Numerical simulation of the moving interface is widely investigated in the fields of two-phase flow, crystal growth, molten metal casting and so on. To simulate accurately and quickly motion state of the moving interface, two types of interface-capturing method, LSM (level set method) and MCLS (mass-conserving LSM coupled with VOF (volume of fluid)), were comparatively analysed and studied. Two kinds of moving interface, rotation motion of Zaleska slotted disk interface and shearing deformation of the circle interface, were simulated. The level set advection equation was solved with IATVD (the characteristic integral-averaging finite volume method), RK-WENO (the third order Runge-Kutta method with WENO (weighted essentially non-oscillatory)), or the low order method, respectively. The level set function was re-initialized with modified Godunov method. Computation was implemented in different size mesh. When it is independent with mesh size, results show that the high order method, IATVD and RK-WENO, can get higher computing accuracy in LSM without topological geometry change. But computing time cost of RK-WENO is much greater than that of IATVD. For the low order method, LSM captures the moving interface in bad, however, MCLS’s numerical result is very good. But computing time cost of MCLS is much and much greater than that of LSM. For interface-capturing with topological geometry change, these two high order methods all can not capture the moving interface in good in LSM. Nevertheless, the resulting interfaces all are same as original interface in MCLS. These indicate that an appropriate numerical method and interface-capturing method can be chosen to accurately and quickly capture the related moving interface.

Theoretical Aspects of a Multidomain High-Order Method for CAA

2003 ◽  
Author(s):  
Ronan Guenanff ◽  
Pierre Sagaut ◽  
Eric Manoha ◽  
Marc Terracol ◽  
Roger Lewandowsky
Keyword(s):  
High Order ◽  
Order Method ◽  
High Order Method

Polynomial Moving Fitting Method for Edge Identification

2011 ◽  
Vol 308-310 ◽  
pp. 2560-2564 ◽  
Author(s):  
Xiang Rong Yuan
Keyword(s):  
Edge Detection ◽  
Curve Fitting ◽  
Polynomial Function ◽  
High Order ◽  
Polynomial Fitting ◽  
Fitting Method ◽  
Order Polynomial ◽  
Better Than ◽  
Low Order

A moving fitting method for edge detection is proposed in this work. Polynomial function is used for the curve fitting of the column of pixels near the edge. Proposed method is compared with polynomial fitting method without sub-segment. The comparison shows that even with low order polynomial, the effects of moving fitting are significantly better than that with high order polynomial fitting without sub-segment.

Analysis of a filtered high-order method for CAA

2003 ◽  
pp. 1978-1981 ◽  
Author(s):  
R. Guénanff ◽  
P. Sagaut ◽  
E. Manoha ◽  
R. Lewandowski
Keyword(s):  
High Order ◽  
Order Method ◽  
High Order Method
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