Premixed and nonpremixed test problem results

2006 ◽  
pp. 29-47 ◽  
Author(s):  
Mitchell D. Smooke ◽  
Vincent Giovangigli
Keyword(s):  
Test Problem

scholarly journals Clue Insensitivity in Remote Associates Test Problem Solving

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Steven M. Smith ◽  
Cynthia M. Sifonis ◽  
Genna Angello
Keyword(s):  
Problem Solving ◽  
Test Problem ◽  
Remote Associates Test

scholarly journals Test problem for thermal-hydraulics and neutronic coupled calculation fore ALFREAD reactor core

2017 ◽  
Vol 781 ◽  
pp. 012045 ◽  
Author(s):  
A Filip ◽  
G Darie ◽  
I S Saldikov ◽  
A D Smirnov ◽  
G V Tikhomirov
Keyword(s):  
Test Problem ◽  
Reactor Core ◽  
Thermal Hydraulics ◽  
Coupled Calculation

Design for Additive Manufacturing of Cellular Compliant Mechanism Using Thermal History Feedback

2018 ◽  
Author(s):  
Jivtesh Khurana ◽  
Bradley Hanks ◽  
Mary Frecker
Keyword(s):  
Additive Manufacturing ◽  
Energy Absorption ◽  
Thermal History ◽  
Test Problem ◽  
Compliant Mechanisms ◽  
Compliant Mechanism ◽  
Absorption Capacity ◽  
Unit Cell ◽  
Design For Additive Manufacturing ◽  
Area Of Interest

With growing interest in metal additive manufacturing, one area of interest for design for additive manufacturing is the ability to understand how part geometry combined with the manufacturing process will affect part performance. In addition, many researchers are pursuing design for additive manufacturing with the goal of generating designs for stiff and lightweight applications as opposed to tailored compliance. A compliant mechanism has unique advantages over traditional mechanisms but previously, complex 3D compliant mechanisms have been limited by manufacturability. Recent advances in additive manufacturing enable fabrication of more complex and 3D metal compliant mechanisms, an area of research that is relatively unexplored. In this paper, a design for additive manufacturing workflow is proposed that incorporates feedback to a designer on both the structural performance and manufacturability. Specifically, a cellular contact-aided compliant mechanism for energy absorption is used as a test problem. Insights gained from finite element simulations of the energy absorbed as well as the thermal history from an AM build simulation are used to further refine the design. Using the proposed workflow, several trends on the performance and manufacturability of the test problem are determined and used to redesign the compliant unit cell. When compared to a preliminary unit cell design, a redesigned unit cell showed decreased energy absorption capacity of only 7.8% while decreasing thermal distortion by 20%. The workflow presented provides a systematic approach to inform a designer about methods to redesign an AM part.

Pseudo-three-timescale approximation of exponentially modulated free-surface waves

2009 ◽  
Vol 625 ◽  
pp. 435-443 ◽  
Author(s):  
MARK A. KELMANSON
Keyword(s):  
Free Surface ◽  
Surface Waves ◽  
Test Problem ◽  
Evolution Equations ◽  
Film Coating ◽  
Rotating Cylinder ◽  
New Method ◽  
Free Surface Waves ◽  
Numerical Integrations ◽  
Order Of Magnitude

A novel pseudo-three-timescale asymptotic procedure is developed and implemented for obtaining accurate approximations to solutions of an evolution equation arising in thin-film free-surface viscous flow. The new procedure, which employs strained fast and slow timescales, requires considerably fewer calculations than its standard three-timescale counterpart employing fast, slow and slower timescales and may readily be applied to other evolution equations of fluid mechanics possessing wave-like solutions exhibiting exponential decay in amplitude and variations in phase over disparate timescales. The new method is validated on the evolution of free-surface waves on a thin, viscous film coating the exterior of a horizontal rotating cylinder and is shown to yield accurate solutions up to non-dimensional times exceeding by an order of magnitude those of previous related studies. Results of the new method applied to this test problem are demonstrated to be in excellent agreement, over large timescales, with those of corroborative spectrally accurate numerical integrations.

Many-objective optimization algorithm based on adaptive reference vector

2021 ◽  
Vol 40 (1) ◽  
pp. 449-461
Author(s):  
Ziyu Hu ◽  
Xuemin Ma ◽  
Hao Sun ◽  
Jingming Yang ◽  
Zhiwei Zhao
Keyword(s):  
Selection Pressure ◽  
Test Problem ◽  
Pareto Front ◽  
Local Area ◽  
Reference Vector ◽  
Selection Mechanism ◽  
Multi Objective Optimization ◽  
Minimum Standard ◽  
Pareto Dominance ◽  
State Of Art

When dealing with multi-objective optimization, the proportion of non-dominated solutions increase rapidly with the increase of optimization objective. Pareto-dominance-based algorithms suffer the low selection pressure towards the true Pareto front. Decomposition-based algorithms may fail to solve the problems with highly irregular Pareto front. Based on the analysis of the two selection mechanism, a dynamic reference-vector-based many-objective evolutionary algorithm(RMaEA) is proposed. Adaptive-adjusted reference vector is used to improve the distribution of the algorithm in global area, and the improved non-dominated relationship is used to improve the convergence in a certain local area. Compared with four state-of-art algorithms on DTLZ benchmark with 5-, 10- and 15-objective, the proposed algorithm obtains 13 minimum mean IGD values and 8 minimum standard deviations among 15 test problem.

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