Moving from momentum transfer to heat transfer – A comparative study of an advanced Graetz-Nusselt problem using immersed boundary methods
| العنوان: | Moving from momentum transfer to heat transfer – A comparative study of an advanced Graetz-Nusselt problem using immersed boundary methods |
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| المؤلفون: | Elias A.J.F. Peters, Xiaojue Zhu, Jiangtao Lu, Detlef Lohse, Roberto Verzicco, J.A.M. Kuipers |
| المساهمون: | Physics of Fluids, Multi-scale Modelling of Multi-phase Flows |
| المصدر: | Chemical engineering science, 198, 317-333. Elsevier Chemical Engineering Science, 198, 317-333. Elsevier |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Adiabatic wall, General Chemical Engineering, Direct numerical simulation, UT-Hybrid-D, Boundary (topology), 02 engineering and technology, Industrial and Manufacturing Engineering, 020401 chemical engineering, Heat transfer, Boundary value problem, 0204 chemical engineering, Mixed boundary conditions, Continuous/discrete forcing method, Physics, Immersed boundary method, Graetz-Nusselt problem, Applied Mathematics, Momentum transfer, General Chemistry, Mechanics, 021001 nanoscience & nanotechnology, Nusselt number, Multiphase flow, 0210 nano-technology |
| الوصف: | In this paper two immersed boundary methods (IBM), specifically a continuous forcing method (CFM) and a discrete forcing method (DFM), are applied to perform direct numerical simulations (DNSs) of heat transfer problems in tubular fluid-particle systems. Both IBM models are built on the well-developed models utilized in momentum transfer studies, and have the capability to handle mixed boundary conditions at the particle surface as encountered in industrial applications with both active and passive particles. Following a thorough verification of both models for the classical Graetz-Nusselt problem, we subsequently apply them to study a much more advanced Graetz-Nusselt problem of more practical importance with a dense stationary array consisting of hundreds of particles randomly positioned inside a tube with adiabatic wall. The influence of particle sizes and fractional amount of passive particles is analyzed at varying Reynolds numbers, and the simulation results are compared between the two IBM models, finding good agreement. Our results thus qualify the two employed IBM modules for more complex applications. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0009-2509 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7140c1344771e12a010500273c9d171a http://www.scopus.com/inward/record.url?scp=85054526184&partnerID=8YFLogxK |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....7140c1344771e12a010500273c9d171a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00092509 |
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