Optimization of Control Line Encapsulation Based on Numerical Simulations of Shock and Vibration

Abstract Control line integrity is fundamental to ensure operability of intelligent completion systems. Damage to control lines can normally occur during string deployment (by shock), or during productive life (by vibration-related fatigue). This work aimed to investigate how encapsulation will affect control line survivability throughout their entire life cycle. Numerical simulations were carried out using geometrical arrangements of control lines typically found in completion valves and tubings. For installation loads, lines were submitted to shock simulations, both inside and outside of protection clamps. The role of flatpack material was studied, as to which kind of material would better absorb impact energy. For productive life loads, the flow-induced vibration was taken into account for high-rate injector wells. Vibration loads were based on force results obtained by Computational Fluid Dynamics (CFD). Structural Finite Element Analysis (FEA) was performed to obtain local tensions to estimate productive life of lines.

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Addressing Shell Mode Vibration in Ducts in Refinery With Computational Models and Field Data

Volume 4: Fluid-Structure Interaction ◽

10.1115/pvp2019-93613 ◽

2019 ◽

Author(s):

Ishita Chakraborty ◽

Anup Paul ◽

Gyorgy Szasz

Keyword(s):

Computational Models ◽

Field Measurements ◽

Operating Conditions ◽

Flow Induced Vibration ◽

Element Analysis ◽

Vibration Data ◽

Response Data ◽

Design Changes ◽

Mode Vibration ◽

Computational Fluid Dynamics Cfd

Abstract This paper describes the work performed to study the shell mode vibration of a large cross-section flue gas duct. The work involved the collection of field vibration data, as well as predictive computational models associated with finite element analysis (FEA) and computational fluid dynamics (CFD). The goal of this work was to use predictive models to ascertain whether a proposed design change would reduce the vibration levels of the duct under similar operating conditions. The vibration observed in the duct was identified as a flow induced vibration (FIV) which excited the shell modes of the duct walls. This case study serves as an example of using predictive computational models (FEA and CFD), calibrated with vibration response data from field measurements, to represent the real world situation as closely as possible within specified budget and schedule constraints. Such calibrated models can be useful for forecasting the effectiveness of various proposed design changes.

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Preparing the Child for Productive Life

IJOHMN ◽

10.24113/ijohmn.v5i4.155 ◽

2019 ◽

Vol 5 (4) ◽

pp. 16

Author(s):

Stella Baindu Fortune Fortune

Keyword(s):

Learner Control ◽

Counseling Services ◽

Guidance And Counseling ◽

School Life ◽

Productive Life ◽

Know How ◽

Physical Conditions ◽

The Family ◽

Genetic Endowment

The nature of children’s development is greatly influenced by the environmental conditions in which they are brought up. The amount of social stimulation which they receive is of particular importance, and even if physical conditions are adequate, an unstimulating environment which provides with little opportunity or need to experiment or solve problems will result in low level of achievement. Perhaps the most important aspect of the child’s social development is beyond the reach of the teacher. For the first very important aspect of the child’s development lies in the home. Genetic endowment and cultural level of the family, coupled with the actual physical conditions of the home will have decisive effect on the child’s development and will continue to influence him throughout his school life. These factors are inaccessible to be influenced by the teacher but it is as well for him to have them in mind in his dealings with pupils. In addition, he will need to know how he may most effectively change his pupils along the lives he considers to be the most appropriate. That is, he will seek out the most efficient ways of getting pupils learn for productive life in future. The topic under review will be approached from various fronts which include; The Sociological and Philosophical models; role of the school; Learners’ responsibility; role of the teacher; discipline and learner control; role of the parent; guidance and counseling services and conclusion.

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Crucial role of physiotherapy in treating COVID-19 patients

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11ispl1.3300 ◽

2020 ◽

Vol 11 (SPL1) ◽

pp. 967-971

Author(s):

Poonam Thakre ◽

Waqar M. Naqvi ◽

Trupti Deshmukh ◽

Nikhil Ingole ◽

Sourabh Deshmukh

Keyword(s):

Public Health ◽

Distress Syndrome ◽

Public Health Problem ◽

Public Health Emergency ◽

High Rate ◽

Major Public Health Problem ◽

Front Line ◽

The Many ◽

Sixth International

The emergence in China of 2019 of severe acute respiratory syndrome coronavirus2 (SARS-CoV-2) previously provisionally names 2019-nCoV disease (COVID19) caused major global outbreak and is a major public health problem. On 30 January 2020, the WHO declared COVID19 to be the sixth international public health emergency. This present pandemic has engrossed the globe with a high rate of mortality. As a front line practitioner, physiotherapists are expected to be getting in direct contact with patients infected with the virus. That’s why it is necessary for understanding the many aspects of their role in the identification, contains, reduces and treats the symptoms of this disease. The main presentation is the involvement of respiratory system with symptoms like fever, cough, sore throat, sneezing and characteristics of pneumonia leads to ARDS(Acute respiratory distress syndrome) also land up in multiorgan dysfunction syndrome. This text describes and suggests physiotherapy management of acute COVID-19 patients. It also includes recommendations and guidelines for physiotherapy planning and management. It also covers the guidelines regarding personal care and equipment used for treatment which can be used in the treatment of acute adult patients with suspected or confirmed COVID-19.

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Liver Radioembolization: An Analysis of Parameters that Influence the Catheter-Based Particle-Delivery via CFD

Current Medicinal Chemistry ◽

10.2174/0929867325666180622145647 ◽

2020 ◽

Vol 27 (10) ◽

pp. 1600-1615 ◽

Cited By ~ 2

Author(s):

Jorge Aramburu ◽

Raúl Antón ◽

Alejandro Rivas ◽

Juan C. Ramos ◽

Bruno Sangro ◽

...

Keyword(s):

Numerical Simulations ◽

Particle Distribution ◽

Numerical Approach ◽

Radioactive Microspheres ◽

Tumor Bearing ◽

Hemodynamic Pattern ◽

Valuable Treatment ◽

Catheter Tip ◽

Radiation Induced ◽

Computational Fluid Dynamics Cfd

Radioembolization (RE) is a valuable treatment for liver cancer. It consists of administering radioactive microspheres by an intra-arterially placed catheter with the aim of lodging these microspheres, which are driven by the bloodstream, in the tumoral bed. Even though it is a safe treatment, some radiation-induced complications may arise. In trying to detect or solve the possible incidences that cause nontarget irradiation, simulating the particle- hemodynamics in hepatic arteries during RE by computational fluid dynamics (CFD) tools has become a valuable approach. This paper reviews the parameters that influence the outcome of RE and that have been studied via numerical simulations. In this numerical approach, the outcome of RE is regarded as successful if particles reach the artery branches that feed tumor-bearing liver segments. Up to 10 parameters have been reviewed. The variation of each parameter actually alters the hemodynamic pattern in the vicinities of the catheter tip and locally alters the incorporation of the particles into the bloodstream. Therefore, in general, the local influences of these parameters should result in global differences in terms of particle distribution in the hepatic artery branches. However, it has been observed that under some (qualitatively described) appropriate conditions where particles align with blood streamlines, the local influence resulting from a variation of a given parameter vanishes and no global differences are observed. Furthermore, the increasing number of CFD studies on RE suggests that numerical simulations have become an invaluable research tool in the study of RE.

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Exploring the effectiveness of a COVID-19 contact tracing app using an agent-based model

Scientific Reports ◽

10.1038/s41598-020-79000-y ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Jonatan Almagor ◽

Stefano Picascia

Keyword(s):

High Rate ◽

Contact Tracing ◽

Agent Based Model ◽

Agent Based ◽

The Social ◽

Behavioural Factors ◽

The Impact ◽

Different Levels ◽

User Rate

AbstractA contact-tracing strategy has been deemed necessary to contain the spread of COVID-19 following the relaxation of lockdown measures. Using an agent-based model, we explore one of the technology-based strategies proposed, a contact-tracing smartphone app. The model simulates the spread of COVID-19 in a population of agents on an urban scale. Agents are heterogeneous in their characteristics and are linked in a multi-layered network representing the social structure—including households, friendships, employment and schools. We explore the interplay of various adoption rates of the contact-tracing app, different levels of testing capacity, and behavioural factors to assess the impact on the epidemic. Results suggest that a contact tracing app can contribute substantially to reducing infection rates in the population when accompanied by a sufficient testing capacity or when the testing policy prioritises symptomatic cases. As user rate increases, prevalence of infection decreases. With that, when symptomatic cases are not prioritised for testing, a high rate of app users can generate an extensive increase in the demand for testing, which, if not met with adequate supply, may render the app counterproductive. This points to the crucial role of an efficient testing policy and the necessity to upscale testing capacity.

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Big hitting collectors make massive and disproportionate contribution to the discovery of plant species

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2011.2439 ◽

2012 ◽

Vol 279 (1736) ◽

pp. 2269-2274 ◽

Cited By ~ 21

Author(s):

Daniel P. Bebber ◽

Mark A. Carine ◽

Gerrit Davidse ◽

David J. Harris ◽

Elspeth M. Haston ◽

...

Keyword(s):

Plant Species ◽

Biological Diversity ◽

High Rate ◽

Type Specimens ◽

Fundamental Goal ◽

The World ◽

Plant Families ◽

The Right ◽

Geographical Locations

Discovering biological diversity is a fundamental goal—made urgent by the alarmingly high rate of extinction. We have compiled information from more than 100 000 type specimens to quantify the role of collectors in the discovery of plant diversity. Our results show that more than half of all type specimens were collected by less than 2 per cent of collectors. This highly skewed pattern has persisted through time. We demonstrate that a number of attributes are associated with prolific plant collectors: a long career with increasing productivity and experience in several countries and plant families. These results imply that funding a small number of expert plant collectors in the right geographical locations should be an important element in any effective strategy to find undiscovered plant species and complete the inventory of the world flora.

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