scholarly journals Fluid–Structure Coupling Effects in a Dual U-Tube Coriolis Mass Flow Meter

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 982
Author(s):  
Yuh-Chung Hu ◽  
Zen-Yu Chen ◽  
Pei-Zen Chang
Keyword(s):  
Product Design ◽  
Dynamic Balance ◽  
Fluid Viscosity ◽  
Fluid Structure ◽  
Development Platform ◽  
Design Considerations ◽  
Manufacture Process ◽  
Coupling Dynamics ◽  
Comsol Simulation ◽  
Important Design

Coriolis mass flowmeters are highly customized products involving high-degree fluid-structure coupling dynamics and high-precision manufacture. The typical delay from from order to shipment is at least 4 months. This paper presents some important design considerations through simulation and experiments, so as to provide manufacturers with a more time-efficient product design and manufacture process. This paper aims at simulating the fluid-structure coupling dynamics of a dual U-tube Coriolis mass flowmeter through the COMSOL simulation package. The simulation results are experimentally validated using a dual U-tube CMF manufactured by Yokogawa Co., Ltd. in a TAF certified flow testing factory provided by FineTek Co., Ltd. Some important design considerations are drawn from simulation and experiment. The zero drift will occur when the dual U-tube structure is unbalanced and therefore the dynamic balance is very important in the manufacturing of dual U-tube CMF. The fluid viscosity can be determined from the driving current of the voice coil actuator or the pressure loss between the inlet and outlet of CMF. Finally, the authors develop a simulation application based on COMSOL’s development platform. Users can quickly evaluate their design through by using this application. The present application can significantly shorten product design and manufacturing time.

scholarly journals Perceived Facilitators and Barriers to Engaging with a Digital Intervention among Those with Food Insecurity, Binge Eating, and Obesity

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2458
Author(s):  
Anu Venkatesh ◽  
Angela Chang ◽  
Emilie A. Green ◽  
Tianna Randall ◽  
Raquel Gallagher ◽  
...  
Keyword(s):  
Binge Eating ◽  
Food Insecurity ◽  
Future Research ◽  
Grocery Stores ◽  
User Centered Design ◽  
Design Considerations ◽  
Digital Intervention ◽  
Intervention Cost ◽  
Facilitators And Barriers ◽  
Important Design

Interventions that address binge eating and food insecurity are needed. Engaging people with lived experience to understand their needs and preferences could yield important design considerations for such interventions. In this study, people with food insecurity, recurrent binge eating, and obesity completed an interview-based needs assessment to learn facilitators and barriers that they perceive would impact their engagement with a digital intervention for managing binge eating and weight. Twenty adults completed semi-structured interviews. Responses were analyzed using thematic analysis. Three themes emerged. Participants shared considerations that impact their ability to access the intervention (e.g., cost of intervention, cost of technology, accessibility across devices), ability to complete intervention recommendations (e.g., affordable healthy meals, education to help stretch groceries, food vouchers, rides to grocery stores, personalized to budget), and preferred intervention features for education, self-monitoring, personalization, support, and motivation/rewards. Engaging people with lived experiences via user-centered design methods revealed important design considerations for a digital intervention to meet this population’s needs. Future research is needed to test whether a digital intervention that incorporates these recommendations is engaging and effective for people with binge eating and food insecurity. Findings may have relevance to designing digital interventions for other health problems as well.

scholarly journals Design of Consumables in a Resource-Efficient Economy—A Literature Review

2021 ◽  
Vol 13 (3) ◽  
pp. 1036
Author(s):  
Siri Willskytt
Keyword(s):  
Life Cycle ◽  
Literature Review ◽  
Product Design ◽  
Circular Economy ◽  
Design Guidelines ◽  
The Novel ◽  
Specific Design ◽  
Design Considerations ◽  
Life Cycle Perspective ◽  
General Product

Consumable products have received less attention in the circular economy (CE), particularly in regard to the design of resource-efficient products. This literature review investigates the extent to which existing design guidelines for resource-efficient products are applicable to consumables. This analysis is divided into two parts. The first investigates the extent to which general product-design guidelines (i.e., applicable to both durables and consumables) are applicable to consumables. This analysis also scrutinizes the type of recommendations presented by the ecodesign and circular product design, to investigate the novel aspects of the CE in product design. The second analysis examines the type of design considerations the literature on product-type specific design guidelines recommends for specific consumables and whether such guidelines are transferable. The analysis of general guidelines showed that, although guidelines are intended to be general and applicable to many types of products, their applicability to consumable products is limited. Less than half of their recommendations can be applied to consumables. The analysis also identified several design considerations that are transferable between product-specific design guidelines. This paper shows the importance of the life-cycle perspective in product design, to maximize the opportunities to improve consumables.

An Approximate Analysis of Foundation Stresses in Horizontal Pressure Vessels

1980 ◽  
Vol 102 (3) ◽  
pp. 555-557
Author(s):  
Krishna P. Singh ◽  
V. K. Luk
Keyword(s):  
Solution Procedure ◽  
Pressure Vessels ◽  
Approximate Analysis ◽  
Loading Conditions ◽  
Mechanical Loads ◽  
Design Considerations ◽  
Desirable Feature ◽  
Horizontal Pressure ◽  
Linear Manner ◽  
Important Design

Saddle supports of horizontally mounted pressure vessels, when subject to seismic and mechanical loads, interact with the foundation in a highly non-linear manner. The maximum foundation concrete pressure, and hold-down bolt stresses are important design considerations which often govern the vessel support geometry. A method is given herein to determine the foundation stresses due to arbitrary imposed loadings. The solution procedure lends itself easily to automated computation—a highly desirable feature—since most nuclear equipment has to be analyzed for a large number of loading conditions.

Climate Geoengineering and the Role of Public Deliberation: A Comment on the us National Academy of Sciences’ Recommendations on Public Participation

Climate Law ◽  
2015 ◽  
Vol 5 (2-4) ◽  
pp. 252-294 ◽  
Author(s):  
William C. G. Burns ◽  
Jane A. Flegal
Keyword(s):  
Public Participation ◽  
Public Deliberation ◽  
National Academy Of Sciences ◽  
World Community ◽  
Design Considerations ◽  
The Us ◽  
The World ◽  
Academy Of Sciences ◽  
Important Design

The feckless response of the world community to the mounting threat of climate change has led to a growing interest in climate geoengineering research. In early 2015, the us National Academy of Sciences released two major reports on the topic. While it is notable that both reports recommended some form of public participation to inform research, this article argues that the vagueness of these recommendations could mean that their implementation might not comport with optimal approaches for public deliberation. We outline some options for public deliberation on climate geoengineering and important design considerations.

An Exact Solution for Flow Transients in Two-Phase Systems by the Method of Characteristics

1973 ◽  
Vol 95 (4) ◽  
pp. 470-476 ◽  
Author(s):  
J. M. Gonzalez-Santalo ◽  
R. T. Lahey
Keyword(s):  
Exact Solution ◽  
Method Of Characteristics ◽  
Accurate Analysis ◽  
Two Phase ◽  
Design Considerations ◽  
The Method Of Characteristics ◽  
System Flow ◽  
Hypothetical Accident ◽  
Phase Systems ◽  
Important Design

One of the important design considerations in modern water-cooled nuclear reactors is their thermal performance during hypothetical accident situations. However, an accurate analysis of the system thermal-hydraulics is required before the thermal margins can be appraised. In this paper, an analysis based on the method of characteristics has been developed by which the exact solution to flow decay transients in homogeneous two-phase systems can be obtained. The exact solution presented yields the system flow and quality at each point in space and time during an exponential flow decay transient. These parameters can then be combined with an appropriate CHF correlation to predict the occurrence of transient CHF.

Mechanical Product Design Wizard Rapid Development Platform Research Based on Axiomatic Design

2014 ◽  
Vol 902 ◽  
pp. 351-356
Author(s):  
Ying Jie Wu ◽  
Qi Gao ◽  
Gang Liu ◽  
Ting Xu
Keyword(s):  
Product Design ◽  
System Architecture ◽  
Rapid Development ◽  
Axiomatic Design ◽  
Development Work ◽  
Independence Axiom ◽  
Development Platform ◽  
Information Axiom

In order to reduce time and cost in mechanical product design wizards development work, the Mechanical Product Design Wizard Rapid Development Platform (MPDW-RDP) was established. According to the Independence Axiom, the system architecture of the MPDW-RDP was obtained, then, the MPDW-RDP had been implemented by taking advantage of existing mature software and components in accordance with the Information Axiom, at last, application case indicated that this system can rapidly develop different kinds of mechanical product design wizard.

scholarly journals Circular economy design considerations for research and process development in the chemical sciences

2016 ◽  
Vol 18 (14) ◽  
pp. 3914-3934 ◽  
Author(s):  
James H. Clark ◽  
Thomas J. Farmer ◽  
Lorenzo Herrero-Davila ◽  
James Sherwood
Keyword(s):  
Product Design ◽  
Circular Economy ◽  
Process Development ◽  
Design Considerations

This perspective on the circular economy is a call for chemists to value resources through responsible product design.

Fluid Structure Coupling Analysis of Ultrasonic Traveling Wave Driving

2012 ◽  
Vol 562-564 ◽  
pp. 1724-1727
Author(s):  
Chang Zhi Wei ◽  
Shou Shui Wei ◽  
Ya Tao Zhang ◽  
Chong Zhang
Keyword(s):  
Fluid Velocity ◽  
Element Model ◽  
Travelling Wave ◽  
Fluid Viscosity ◽  
Driving Voltage ◽  
Driving Frequency ◽  
Coupling Analysis ◽  
Fluid Structure ◽  
Resonance Frequencies ◽  
Driving Model

An ultrasonic travelling wave micro-fluid driving model was presented. Principle of the driving model was introduced and finite element model was developed. Resonance frequencies were predicted by modal analysis. Fluid structure coupling analysis was done to observe the transient fluid velocity. The time-averaged velocity was calculated. Influences of driving voltage, driving frequency and fluid viscosity on time-averaged velocity were taken into accounted. The results indicate that the time-averaged velocity profile is asymmetric parabola and is influenced by the driving frequency obviously. The maximum time-averaged velocity decreases with the increasing of fluid viscosity and reflux appears when the fluid viscosity reaches to 0.07Pa·s.

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