Are today's verification tools able to handle current design challenges?

2006 ◽  
Author(s):  
R. Goering ◽  
R. Fans ◽  
K. Larsen ◽  
H. Foster ◽  
S. Swwan
Keyword(s):  
Current Design ◽  
Verification Tools ◽  
Design Challenges

The law of unintended consequences: current design challenges in inferior vena cava filters

2017 ◽  
Vol 14 (10) ◽  
pp. 805-810 ◽  
Author(s):  
Audrey Magnowski ◽  
Matthew Brown ◽  
Kristofer Schramm ◽  
Jonathan Lindquist ◽  
Paul J Rochon ◽  
...  
Keyword(s):  
Inferior Vena Cava ◽  
Inferior Vena ◽  
Vena Cava ◽  
Unintended Consequences ◽  
Inferior Vena Cava Filters ◽  
Vena Cava Filters ◽  
Current Design ◽  
The Law ◽  
Design Challenges

scholarly journals From Bioinspired to Bioinformed: Benefits of Greater Engagement From Biologists

2021 ◽  
Vol 9 ◽  
Author(s):  
Leslie Ng ◽  
Mark A. Elgar ◽  
Devi Stuart-Fox
Keyword(s):  
Web Of Science ◽  
Limited Range ◽  
Biological Information ◽  
Model Species ◽  
Current State ◽  
Biological Phenomena ◽  
Current Design ◽  
Diversity Of Life ◽  
Design Challenges ◽  
The Web

Bioinspiration and biomimetics is a rapidly growing field where insights from biology are used to solve current design challenges. Nature provides an abundance of inspiration to draw upon, yet biological information is under-exploited due to a concerning lack of engagement from biologists. To assess the extent of this problem, we surveyed the current state of the field using the Web of Science database and found that only 41% of publications on bioinspired or biomimetic research included an author affiliated with a biology-related department or organisation. In addition, most publications focus exclusively on a limited range of popular model species. Considering these findings, we highlight key reasons why greater engagement from biologists will enable new and significant insights from natural selection and the diversity of life. Likewise, biologists are missing unique opportunities to study biological phenomena from the perspective of other disciplines, particularly engineering. We discuss the importance of striving toward a bioinformed approach, as current limitations in the field can only be overcome with a greater understanding of the ecological and evolutionary contexts behind each bioinspired/biomimetic solution.

scholarly journals The orbital friction welding process for engines components in aeronautic

2020 ◽  
Vol 321 ◽  
pp. 04024
Author(s):  
Jérémy Escaffre ◽  
Yann Lefaux ◽  
Astrid Lenain
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Friction Welding ◽  
Welding Process ◽  
Good Resistance ◽  
Weight Saving ◽  
Current Design ◽  
Corrosion And Oxidation ◽  
Design Challenges ◽  
The Way

Titanium alloys are key materials in engines due to their low density, their high mechanical properties and their good resistance to corrosion and oxidation. Titanium engine parts are manufactured most of the time by forging, giving good mechanical properties associated with the possibility to optimize final microstructures of the parts. Due to design challenges consisting of making parts more robust and lighter, new processes are emerging. For some parts, friction welding can give opportunities to achieve those objectives because these assemblies are characterised by very good mechanical properties, generally higher than the raw unwelded materials [1]. As a consequence, the friction welding process is finding increasing applications as a manufacturing technology for the production of titanium alloy Ti-6Al-4V aerospace components [2]. Among those processes, the Orbital Friction Welding (OFW) technology is under study for low pressure compressors manufacturing. The BLuM® (Bladed drum, Figure 1), is constituted of a drum comprising several stages of friction-welded blades. Such architecture allows an important weight saving and performances improvement compared to current design. The objective of the article consists of addressing the orbital friction welding process, through the description of its characteristics, the key process parameters, the microstructures and the way of ensuring good integrity of the interface. The objective of the article consists of addressing the orbital friction welding process, through the description of its characteristics, the key process parameters, the microstructures and the way of ensuring good integrity of the interface.

Recent developments in vertical cooling crystalliser design

2011 ◽  
pp. 726-733
Author(s):  
Michael Getaz ◽  
Rob Sanders
Keyword(s):  
Motor Drive ◽  
Steady Increase ◽  
Unit Size ◽  
Heat Transfer Characteristics ◽  
Heat Exchange Surface ◽  
Recent Developments ◽  
Cooling Tube ◽  
Good Heat ◽  
Exchange Surface ◽  
Design Challenges

In modern installations vertical cooling crystallisers are now preferred over traditional horizontal units because of the significant benefits they offer, which include larger volumes and smaller floor space, suitability for outdoor installation, higher cooling surface to volume ratios and a better ability to handle highly viscous massecuite, amongst others. Since the first vertical cooling crystallisers were introduced, nearly 40 years ago, there has been a steady increase in their unit size from initial volumes in the 50–200 m3 range up to the present day where the most general unit size is now in the 300–400 m3 range, with even larger units becoming increasingly common. Large crystallisers present some significant design challenges and a good modern vertical cooling crystalliser design requires a robust construction of heat exchange surface, stirrer and drive units coupled with features that promote good heat transfer characteristics and uniform massecuite flow patterns. Careful attention to cooling tube and stirrer arm design and configuration are needed to achieve this, whilst the use of modern planetary gearboxes and variable frequency controlled motor drive units can provide added benefits to boost both performance and reliability. How these design features are incorporated in a modern unit is explained, focusing on cane C massecuite duty and using the Fives Cail and Fives Fletcher units as an example.

Site Selection, Current Design and Management Practices for Land Treatment Units of Petroleum Wastes

1991 ◽  
Vol 24 (12) ◽  
pp. 83-91
Author(s):  
D. C. P. Casarini ◽  
E. Gloeden ◽  
R. C. de A. Cunha
Keyword(s):  
Site Selection ◽  
Management Practices ◽  
Design Management ◽  
Hazardous Waste Management ◽  
Land Treatment ◽  
Management Technology ◽  
Current Design ◽  
Treatment Facilities ◽  
Petroleum Refineries ◽  
Selection Of

Land treatment is defined as the hazardous waste management technology related to application and incorporation of waste into the defined treatment zone of the soil where will occur the degradation, transformation and immobilization of the constituents contained in the applied waste, to ensure protection of surface water and groundwater. This paper describes some criteria for site selection of land treatment facilities used by petroleum refineries, as well as the engineering design, management practices to optimize the process and closure and post-closure techniques.

The influence of currents on circular secondary clarifier performance and design

1996 ◽  
Vol 34 (3-4) ◽  
pp. 405-412 ◽  
Author(s):  
Andrea Deininger ◽  
Frank W. Günthert ◽  
Peter A. Wilderer
Keyword(s):  
Wastewater Treatment ◽  
Density Currents ◽  
Clear Water ◽  
Performance Measurements ◽  
Design Procedures ◽  
Secondary Clarifier ◽  
Current Design ◽  
Hydraulic Load ◽  
Novel Design ◽  
Wastewater Treatment Systems

Density currents in the deeper zones of clarifiers and currents in the clear water zone have a significant influence on clarifier performance. Measurements of flow velocity profiles were conducted in full-scale horizontally flown circular secondary clarifiers. Relations between the hydraulic load and the development of density currents could be detected. Those patterns are not taken into account in current design procedures. Stationary design approaches are mainly based on the overflow rate. Novel design methods based on the dynamic behavior of flow and density distribution in clarifiers are needed in order to improve the efficacy of wastewater treatment systems.

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