Results 191 to 200 of about 23,319,759 (233)

Review of CFD modelling techniques for single‐phase and multiphase flow in static mixers

The Canadian Journal of Chemical Engineering, EarlyView.
This review synthesizes computational fluid dynamics (CFD) approaches for static mixers, linking hydrodynamics to pressure drop, particle/droplet distributions, mixing metrics, and heat‐transfer performance to guide modelling choices and design decisions. Abstract Static mixers enable compact and low‐energy intensification.
Jussan Jaeger, Sálvio Lima de Carvalho Neto, Silvio Edegar Weschenfelder, Glaucia Rodrigues Vieira de Almeida da Fonseca, Maria de Fátima Rodrigues da Cunha, Selene Maria Arruda Guelli Ulson de Souza, Evandro Balestrin, Adriano da Silva   +7 more
wiley   +1 more source

Demulsifying agent simplified model for offshore oil wells

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This article addresses key challenges in offshore petroleum production caused by multiphase flow instabilities, such as slug flow and emulsion formation. Traditionally, severe slugging is mitigated by increasing wellhead backpressure through partial choke valve closure. In this context, a simplified dynamic model—the fast offshore wells model (
Fernanda Bernardi de Souza, Bárbara Isabel Santarossa, Ricardo França Rodrigues, Fabio Diehl, Marcelo Farenzena, Jorge Otávio Trierweiler   +5 more
wiley   +1 more source

Tear Film Stability and Tear Break Up Time (TBUT) in Laboratory Rabbits—A Systematic Review

Current Eye Research, 2018
Several older studies on rabbits indicated that the pre-corneal tear film was unusually stable and this perspective was revisited recently. However, the methods used for these studies were very different from those generally used in human studies. A literature search was undertaken for the time period of 1965 through 2017, mainly using PubMed, to ...
Michael J Doughty
exaly   +6 more sources

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Study of tear film flow and break up time (BUT) in trachoma

Acta Ophthalmologica, 1986
Abstract Tear film flow and stability studies were carried out in patients suffering from cicatrizing trachoma by Schirmer test I and tear film break‐up‐time (BUT) measurements, respectively. Both Schirmer test I and BUT values were decreased significantly (t‐test, P < 0.001) depicting aqueous as well as mucin deficiency and hence, an unstable tear ...
S S, Moudgil, M, Singh, I P, Parmar, A K, Khurana   +3 more
openaire   +4 more sources

The effect of blinking pattern on tear film break-up time

, 2018
Purpose : To assess the tear film break-up time (BUT) after natural and forced blinks using standard fluorescein test (FBUT) and two videokeratoscopes providing the non-invasive tear film break-up time (NIBUT) assessment. Additionally, the purpose was to test the performance of two videokeratoscopes in objective and subjective NIBUT evaluation.Methods :
Szczesna-Iskander, Dorota Helena, Llorens Quintana, Clara, Swiderska, Kasandra   +2 more
core   +10 more sources

Corneal hyperalgesia in patients with short tear film break-up time dry eye

The Ocular Surface, 2019
To evaluate corneal tactile and pain sensations in patients with short tear film break-up time dry eye (sBUT DE).This study enrolled 60 patients with sBUT DE and 46 healthy volunteers from Japan. We evaluated corneal tactile and pain sensations using a modified method with the Cochet-Bonnet corneal esthesiometer.Patients with sBUT DE had higher corneal
Yoshiaki, Tagawa, Kousuke, Noda, Takeshi, Ohguchi, Yoshitsugu, Tagawa, Susumu, Ishida, Nobuyoshi, Kitaichi   +5 more
openaire   +4 more sources

Automation of the tear film break-up time test

Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies, 2011
The Break-Up Time test (BUT) evaluates the quality and stability of the tear film. It is used for the diagnosis of the dry eye syndrome, a widespread disease in the developed world. This paper describes an automatic methodology to evaluate the BUT test. This methodology locates the different measurement areas from a video of the tear film, extracts the
Elsa Cebreiro, Lucía Ramos, Antonio Mosquera González, Noelia Barreira, Manuel Francisco González Penedo   +4 more
openaire   +1 more source

Evaluation of Tear Film Interference Patterns and Measures of Tear Break-Up Time

Optometry and Vision Science, 2002
ABSTRACT: Purpose. The purpose of this study was to compare the agreement within and between examiners when evaluating real‐time and digital photographs of TearScope Plus tear film interference patterns.
Jason J, Nichols, Kelly K, Nichols, Brian, Puent, Mario, Saracino, G Lynn, Mitchell   +4 more
openaire   +2 more sources

Thermographic evaluation of tear film break-up time to study tear film stability

International Journal of Thermal Sciences, 2016
Abstract Tear film instability is one of the major characteristics of dry eye syndrome. However, traditional diagnostic method like fluorescein tear film break-up time (FTBUT) test is limited by its invasiveness, the necessity to use fluorescein sodium and thus variable result.
Tai Yuan Su, Wei Ting Ho, Shu Wen Chang, Huihua Kenny Chiang   +3 more
openaire   +1 more source

Schirmer tear test values and tear film break‐up times in cats with conjunctivitis

Veterinary Ophthalmology, 2005
AbstractObjectives (1) To document tear film break‐up time (TFBUT) in a group of cats with conjunctivitis; (2) to determine if TFBUTs from cats with conjunctivitis vary significantly from previously established normal values for TFBUT in young cats without ocular disease; (3) to determine if a correlation exists between Schirmer tear test (STT) values ...
Christine C, Lim, Cheryl L, Cullen
openaire   +2 more sources