Hydrodynamic Effects on the Boiling Interface in a Misaligned, Two-Phase, Mechanical Seal—A Qualitative Study

1996 ◽  
Vol 39 (4) ◽  
pp. 922-928 ◽  
Author(s):  
I. Etsion ◽  
M. D. Pascovici
Keyword(s):  
Qualitative Study ◽  
Mechanical Seal ◽  
Two Phase ◽  
Hydrodynamic Effects

scholarly journals Investigation of two-phase change flow in mechanical seal with complex solid surfaces

AIP Advances ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 065210
Author(s):  
Jie Yang ◽  
Shuangfu Suo ◽  
Zhihao Wang ◽  
Aiming Wang ◽  
Guoying Meng
Keyword(s):  
Phase Change ◽  
Solid Surfaces ◽  
Mechanical Seal ◽  
Two Phase

scholarly journals ‘Place bonding’ in children’s hospice care: a qualitative study

2018 ◽  
Vol 10 (3) ◽  
pp. e25-e25 ◽  
Author(s):  
Helena Dunbar ◽  
Bernie Carter ◽  
Jayne Brown
Keyword(s):  
Grounded Theory ◽  
Qualitative Study ◽  
Hospice Care ◽  
Phase 1 ◽  
Constructivist Grounded Theory ◽  
Two Phase ◽  
Semistructured Interviews ◽  
New Perspective ◽  
Limiting Condition ◽  
Place Bonding

BackgroundLimited knowledge exists of parents’ perceptions and experiences of children’s hospices and how these contribute to the varied access and uptake of services.AimThis study aimed to explore parents’ perspectives and experiences of a hospice, to understand the barriers and/or facilitators to accessing a hospice, and what characteristics parents wanted from hospice provision.MethodsA two-phase qualitative study underpinned by a constructivist grounded theory methodology was employed. Phase 1 used focus groups to collect data from parents of children already accessing the hospice (n=24). Phase 2 used in-depth semistructured interviews with parents of children who did not use the hospice (n=7) and with parents who had previous experience of using a hospice (n=7).ResultsA grounded theory of place bonding was developed which illustrates the cognitive journey taken by parents of children with life-limiting conditions considering/receiving hospice care for their child.ConclusionsFinding a place where they belonged and felt at ‘home’ made the decision to accept help in caring for their child with a life-limiting condition more acceptable. The theory of place bonding offers children’s hospices a new perspective from which to view how parents access, accept and build relationships at the hospice.

Numerical model of two-phase mechanical face seal with shallow grooves based on finite volume method

2020 ◽  
Vol 72 (10) ◽  
pp. 1303-1309
Author(s):  
Wenbin Gao ◽  
Weifeng Huang ◽  
Tao Wang ◽  
Ying Liu ◽  
Zhihao Wang ◽  
...  
Keyword(s):  
Flow Field ◽  
Phase Change ◽  
Finite Volume Method ◽  
Peer Review ◽  
Finite Volume ◽  
Fluid Model ◽  
Mechanical Seal ◽  
Two Phase ◽  
Content Type ◽  
Volume Method

Purpose By modeling and analyzing the two-phase mechanical seal of the fan-shaped groove end face, which is prone to phase change, an effective method to study the flow field of the mechanical seal when both cavitation and boiling exist simultaneously is found. Design/methodology/approach Based on the finite volume method, a fluid model was developed to investigate a two-phase mechanical seal. The validity of the proposed model was verified by comparing with some classical models. Findings By modeling and analyzing the two-phase mechanical seal of the fan-shaped groove end face, which is prone to phase change, the analysis of the gap flow field of the mechanical seal was realized when cavitation and boiling existed simultaneously. Originality/value Based on the model proposed for different conditions, the pressure and phase states in the shallow groove sealing gap were compared. The phase change rate between the mechanical seal faces was also investigated. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-12-2019-0537/

Hydrodynamic effects of mixing vane attached to grid spacer on two-phase annular flows

2016 ◽  
Vol 310 ◽  
pp. 648-655 ◽  
Author(s):  
A. Kawahara ◽  
M. Sadatomi ◽  
Y. Hirakata ◽  
M. Endo
Keyword(s):  
Two Phase ◽  
Annular Flows ◽  
Hydrodynamic Effects

Exploring nurse navigators' contribution to integrated care: a qualitative study

2019 ◽  
Vol 25 (4) ◽  
pp. 339
Author(s):  
Clare Hannan-Jones ◽  
Charlotte Young ◽  
Geoffrey Mitchell ◽  
Allyson Mutch
Keyword(s):  
Qualitative Study ◽  
Integrated Care ◽  
Healthcare Professionals ◽  
Interdisciplinary Collaboration ◽  
Clinical Integration ◽  
Two Phase ◽  
Professional Integration ◽  
Healthcare Settings ◽  
Care Practices ◽  
Depth Interviews

This paper examines nurse navigation as a model of integrated care operating across primary and secondary healthcare settings. A two-phase qualitative study involving a focus group with seven nurse navigators (NNs) to explore their understandings and perceptions of the role, followed by in-depth interviews with three NNs to examine current practice, was undertaken in Queensland, Australia. NNs’ role spanned a continuum of patient and population care, and involved engagement in clinical integration, coordinating patient care and providing education and points-of-contact for healthcare professionals. NNs also engaged in professional integration, fostering interdisciplinary collaboration, education and connections between healthcare professionals, while promoting integrated care across care settings. NNs were enabled through the establishment of relationships, trust and shared communication between stakeholders. NNs’ work transcended traditional clinical boundaries, operating horizontally across silos and specialties, which allowed them to avoid (some) system shortfalls. By contributing to a culture of integration, NNs can potentially support more sustainable integrated care practices that extend relationships between healthcare professionals and beyond individual patients. Increasing our understanding of nurse navigation as a model of integrated care, this study illustrates the complexity, diversity and breadth of the role and its ability to contribute to broader, system-wide integration.

The Boiling Interface in a Misaligned Two-Phase Mechanical Seal

1997 ◽  
Vol 119 (2) ◽  
pp. 265-271 ◽  
Author(s):  
I. Etsion ◽  
M. D. Pascovici ◽  
L. Burstein
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Approximate Solutions ◽  
Operating Conditions ◽  
Mechanical Seal ◽  
Two Phase ◽  
Iterative Solutions

The boiling interface in a misaligned two-phase mechanical seal is analyzed using a complete thermohydrodynamic approach that requires complex simultaneous iterative solutions of the nonaxisymmetric heat transfer and phase-change problems. It is shown that under certain operating conditions, characterized by a modified Sommerfeld number, several approximate solutions with various levels of simplification can be utilized to calculate the boiling radius.

A Homogeneous Phase Change Model for Two-Phase Mechanical Seals With Three-Dimensional Face Structures

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Tao Wang ◽  
Weifeng Huang ◽  
Ying Liu ◽  
Xiangfeng Liu ◽  
Yuming Wang
Keyword(s):  
Flow Field ◽  
Phase Change ◽  
Present Model ◽  
Phase Distribution ◽  
Liquid Fraction ◽  
Change Model ◽  
Mechanical Seal ◽  
Two Phase ◽  
3D Face ◽  
Face Structure

A homogenous phase change model (HPCM) based on the mass conservation law is proposed to analyze the flow field of a two-phase mechanical seal with 3D face structures. The two-phase flow domain is governed by the simultaneous partial differential equation set containing a mass transfer governing equation for each phase with a source term derived from the Rayleigh–Plesset model and a Reynolds equation for the mixture, where the pressure and the liquid fraction are unknowns. A numerical solution is developed based on finite element method (FEM). The results from the present model are in good agreement with those from the previous two-phase mechanical seal models. A two-phase mechanical seal with wavy-tilt-dam face structure is calculated. The results indicate that the 3D face structure affects the phase distribution by altering the film pressure field. The present model is especially useful to analyze the two-phase film flow field bounded by the complex solid surfaces.

Palliative care in the emergency department: A qualitative study exploring barriers, facilitators, desired clinician qualities, and future directions

2021 ◽  
pp. 1-6
Author(s):  
Alexa Gips ◽  
Bethany-Rose Daubman ◽  
Laura A. Petrillo ◽  
Jason Bowman ◽  
Kei Ouchi ◽  
...  
Keyword(s):  
Emergency Department ◽  
Palliative Care ◽  
Qualitative Study ◽  
Barriers And Facilitators ◽  
Future Research ◽  
Structured Interviews ◽  
Two Phase ◽  
Financial Model ◽  
The Future ◽  
The Impact

Abstract Objective To describe the perceived qualities of successful palliative care (PC) providers in the emergency department (ED), barriers and facilitators to ED–PC, and clinicians’ perspectives on the future of ED–PC. Method This qualitative study using semi-structured interviews was conducted in June–August 2020. Interviews were analyzed via a two-phase Rapid Analysis. The study's primary outcomes (innovations in ED–PC during COVID) are published elsewhere. In this secondary analysis, we examine interviewee responses to broader questions about ED–PC currently and in the future. Results PC providers perceived as successful in their work in the ED were described as autonomous, competent, flexible, fast, and fluent in ED language and culture. Barriers to ED–PC integration included the ED environment, lack of access to PC providers at all times, the ED perception of PC, and the lack of a supporting financial model. Facilitators to ED–PC integration included proactive identification of patients who would benefit from PC, ED-focused PC education and tools, PC presence in the ED, and data supporting ED–PC. Increased primary PC education for ED staff, increased automation, and innovative ED–PC models were seen as areas for future growth. Significance of results Our findings provide useful information for PC programs considering expanding their ED presence, particularly as this is the first study to our knowledge that examines traits of successful PC providers in the ED environment. Our findings also suggest that, despite growth in the arena of ED–PC, barriers and facilitators remain similar to those identified previously. Future research is needed to evaluate the impact that ED–PC initiatives may have on patient and system outcomes, to identify a financial model to maintain ED–PC integration, and to examine whether perceptions of successful providers align with objective measures of the same.

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