Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC)最新文献_第2页

Experimental Investigation of Gas Kick behavior during Shut-in Condition 关井工况下气涌特性实验研究

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.tfs.040677

C. Obi, A. Hasan, L. Abril, K. Manikonda, Mohammad Sohel Rahman

引用次数: 1

DETAILED MODELING OF THE FLASH HYDROLYSIS OF ALGAE FOR BIOFUEL PRODUCTION 用于生物燃料生产的藻类快速水解的详细建模

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.25777/QBHP-CX33

N. Legrand

{"title":"DETAILED MODELING OF THE FLASH HYDROLYSIS OF ALGAE FOR BIOFUEL PRODUCTION","authors":"N. Legrand","doi":"10.25777/QBHP-CX33","DOIUrl":"https://doi.org/10.25777/QBHP-CX33","url":null,"abstract":"DETAILED MODELING OF THE FLASH HYDROLYSIS OF ALGAE FOR BIOFUEL -PRODUCTION IN COMSOL MULTIPHYSICS Noah Joseph LeGrand Old Dominion University, 2020 Director: Dr. Orlando M. Ayala Algae-derived biofuels are being commercialized as an important renewable energy source. Like any new technology, conversion improvements are desired, including reductions in process complexity and better utilization of the entire microalgae feedstock. The Old Dominion Biomass Laboratory has focused on flash hydrolysis for algae biofuel production. That process involves rapidly heating algae and water mixed as a slurry to a subcritical state. Results from small-scale bench tests are promising, but process scale up is a challenge. Currently there exists a pilot laboratory scale system utilizing induction heating in order to reach controlled reaction temperatures with a reaction duration of 10 seconds or less. However, the influence of the induction heating process on the resulting reactions had not been examined. That is the focus of this thesis. The pilot flash hydrolysis reactor system has been simulated utilizing COMSOL Multiphysics 5.1. The COMSOL model assumed fully developed laminar slurry flow with an electromagnetic field, rate sensitive chemical reactions, and diffusive transport of dilute species. Mesh refinement analysis, mass and energy balances, and experimental verification have been utilized to validate the model. This study has shown that industrial scale up challenges will include sensitivity to feedstock channel size, induction coil pitch, length and excitation frequency, process residence time, and algae concentration. Furthermore, process efficiency improvement may be possible by thermal management of the rapid heating and subsequent quenching process.","PeriodicalId":330469,"journal":{"name":"Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121982000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LATERAL MIGRATION OF A MELTING PARTICLE IN A VERTICAL POISEUILLE FLOW 垂直泊赛尔流中熔化颗粒的横向迁移

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.mpp.040972

R. Kaviani, M. Naghashnejad, H. Shabgard

引用次数: 1

THE EFFECT OF JOULE HEATING ON THE HEIGHT RISE OF AQUEOUS SOLUTIONS BETWEEN ELECTRODES 焦耳加热对电极间水溶液高度上升的影响

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.mtf.040944

G. Anand, Samira Safaripour Tabalvandani, Craig Snoeyink

引用次数: 2

NUMERICAL MODELING OF A PROPELLER IN AIR AND WATER ENVIRONMENTS 螺旋桨在空气和水环境中的数值模拟

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.aes.040642

K. Matveev

引用次数: 0

High Leading Edge Film Cooling Blowing Ratio Effect on the Main stream Flow in a Linear Vane Cascade 高前缘气膜冷却吹气比对线性叶片叶栅主流流场的影响

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.fnd.042114

A. S. Shote, S. A. Aasa, O. Olatunde

引用次数: 0

VALIDATION OF A DYNAMIC MODEL FOR COOLING TOWER ENERGY EFFICIENCY ANALYSIS 冷却塔能效分析动态模型的验证

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.nmm.040853

S. Jones, Ethan Languri

引用次数: 0

Numerical Analysis of Free Forced Convective Flow with multiple slip effects through vertical cone containing Gyrotactic Microorganism 具有多重滑移效应的自由强制对流通过含回旋微生物的垂直锥的数值分析

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.bio.042972

Nayema Islam Nima, M. Ferdows

引用次数: 0

ENERGY AND WATER, NO CARBON: INTEGRATED NUCLEAR POWER AND LARGE-SCALE DESALINATION AT DIABLO CANYON 能源和水，无碳:在diablo峡谷整合核能和大规模海水淡化

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.ens.040796

A. Bouma, Quantum J Wei, J. Parsons, J. Buongiorno, John H. Lienhard V

引用次数: 0

ON THE EJECTION SCALE PROBLEM OF EXPIRATORY EVENTS FROM THEORY AND SIMULATIONS 从理论和模拟两方面探讨了呼气事件的喷射尺度问题

Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC) Pub Date : 1900-01-01 DOI: 10.1615/tfec2022.bio.040908

Kai Liu, M. Allahyari, J. Salinas, N. Zgheib, S. Balachandar

{"title":"ON THE EJECTION SCALE PROBLEM OF EXPIRATORY EVENTS FROM THEORY AND SIMULATIONS","authors":"Kai Liu, M. Allahyari, J. Salinas, N. Zgheib, S. Balachandar","doi":"10.1615/tfec2022.bio.040908","DOIUrl":"https://doi.org/10.1615/tfec2022.bio.040908","url":null,"abstract":"The overall purpose of this study is to investigate expiratory events such as coughs and sneezes in the ejection scale framework, i.e. within a short time span immediately after the expiration process. We conducted large eddy simulations (LES) and compared the results with a recent theoretical model put forth by Balachandar et al. [2]. The theoretical model [2] has been formulated to estimate the evolution of expiratory events such as coughs and sneezes. Some of the key features of the model include estimates for the time evolution of the puff centroid, its size, as well as the number and size of droplets suspended within. The theoretical model includes closure parameters that have been obtained from LES [6, 7]. The simulations cover a wide range of parameters, such as the ejection volume of the puff, its momentum, the ejection angle (whether horizontal, inclined, or vertical), and the ambient humidity. One of the important findings is that while certain aspects such as the front-most location and the lateral extent of the puff, show large variability from one realization to the other, global parameters, such as the centroid location, total volume, and buoyancy show are much less sensitive to turbulent fluctuations. The results also indicate that humid ambient conditions favor stronger gravitational settling of the ejected virus-laden droplets, thus decreasing the risk of infection from the dominant airborne route. Furthermore, the simulations highlight a mechanism for transporting a relatively large amount of droplets over distances upward of 2 meters in a time span on the order of one second. This mechanism, which is also observed in experiments, consists of fast moving detached vortex rings that propagate in a seemingly random direction. We further quantify the size and viral content of the detached portions. © 2022 Begell House Inc.. All rights reserved.","PeriodicalId":330469,"journal":{"name":"Proceeding of 7th Thermal and Fluids Engineering Conference (TFEC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125437725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0