Hajautettujen faktatietokantojen käytön yksinkertaistuminen

Autor: Kalervo Järvelin, Timo Niemi

Publikováno v: Informaatiotutkimus, Pp 3-16 (2008)

Externí odkaz: https://doaj.org/article/842ecdaf45f04161ae3a15989fafc605

Effect of software implementation on the result of computational fluid dynamics simulation of circulating fluidized bed risers

Autor: Sirpa Kallio, Timo Niemi, Alexander Daikeler, Markku Nikku

Publikováno v: Engineering Reports, Vol 4, Iss 2, Pp n/a-n/a (2022)
Nikku, M, Niemi, T, Kallio, S & Daikeler, A 2022, ' Effect of software implementation on the result of computational fluid dynamics simulation of circulating fluidized bed risers ', Engineering Reports, vol. 4, no. 2, e12460 . https://doi.org/10.1002/eng2.12460

While in scientific literature much focus is directed toward model validation,comparison, and even parametric investigations on individual model parameters, the possible effects of the used computational fluid dynamics (CFD)software on the results ar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57d559817496543696780e043a7bf0ee
https://doaj.org/article/47a49a70188742b2879b448aa8e66df3

Svårigheter vid luftvägshantering av vuxna patienter med obesitas : En litteraturöversikt

Autor: Timo, Niemi, Josef, Eklund

Bakgrund: Övervikt och fetma är ett globalt växande problem. Specialistsjuksköterskor med inriktning anestesisjukvård måste ha god kännedom om de anatomiska, fysiologiska och psykologiska förändringar som fetma medför för att kunna erbjuda

Externí odkaz: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148410

Modeling of conversion of a single fuel particle in a CFD model for CFB combustion

Autor: Timo Niemi, Sirpa Kallio

Publikováno v: Niemi, T & Kallio, S 2018, ' Modeling of conversion of a single fuel particle in a CFD model for CFB combustion ', Fuel Processing Technology, vol. 169, pp. 236-243 . https://doi.org/10.1016/j.fuproc.2017.10.010
Niemi, T & Kallio, S 2017, Modeling of conversion of a single fuel particle in a CFD model for CFB combustion . in Proceedings . Częstochowa University of Technology (CUT), pp. 765-772, 12th International Conference on Fluidized Bed Technology, CFB-12, Krakow, Poland, 23/05/17 .
VTT Technical Research Centre of Finland-PURE
Scopus-Elsevier

In CFD simulation of CFB combustion, computation of the local instantaneous conversion rate of a single fuel particle should be fast. Since fuel conversion is limited by mass and heat transfer and the rates of chemical reactions inside the particle,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34de636bad9fb6765ac789830a304491
https://cris.vtt.fi/en/publications/c7c5bf49-0253-47db-80ab-012edc351ef6

Modeling of the time-averaged gas–solid drag force in a fluidized bed based on results from transient 2D Eulerian–Eulerian simulations

Autor: Timo Niemi, Sirpa Kallio, Juho Peltola

Publikováno v: Kallio, S, Peltola, J & Niemi, T 2014, ' Modeling of the time-averaged gas-solid drag force in a fluidized bed based on results from transient 2D Eulerian-Eulerian simulations ', Powder Technology, vol. 261, pp. 257-271 . https://doi.org/10.1016/j.powtec.2014.04.045

In the present paper, the possibilities to cover all fluidization states by a single drag law in steady-state CFD multiphase flow modeling are evaluated. The time-averaged drag force is expressed as the product of the drag force calculated from the t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a2fb07889eb2caff2cd1fd15f0cf024
https://doi.org/10.1016/j.powtec.2014.04.045