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The effect of Stefan flow on the drag coefficient of spherical particles in a gas flow
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.ORCID-id: 0000-0001-7319-1248
Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway.Department of Thermal Energy, SINTEF Energy Research, Trondheim, Norway.
Department of Chemical Engineering, KTH Royal Institute of Technology, Stockholm, Sweden.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Energivetenskap.ORCID-id: 0000-0002-0308-3871
Vise andre og tillknytning
2019 (engelsk)Inngår i: International Journal of Multiphase Flow, ISSN 0301-9322, E-ISSN 1879-3533, Vol. 117, s. 130-137Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Particle laden flows with reactive particles are common in industrial applications. Chemical reactions inside the particle can generate a Stefan flow that affects heat, mass and momentum transfer between the particle and the bulk flow. This study aims at investigating the effect of Stefan flow on the drag coefficient of a spherical particle immersed in a uniform flow under isothermal conditions. Fully resolved simulations were carried out for particle Reynolds numbers ranging from 0.2 to 14 and Stefan flow Reynolds numbers from (-1) to 3, using the immersed boundary method for treating fluid-solid interactions. Results showed that the drag coefficient decreased with an increase of the outward Stefan flow. The main reason was the change in viscous force by the expansion of the boundary layer surrounding the particle. A simple model was developed based on this physical interpretation. With only one fitting parameter, the performance of the model to describe the simulation data were comparable to previous empirical models.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 117, s. 130-137
Emneord [en]
Drag coefficient, Stefan flow, Boundary layer, multiphase reactive flow
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-73836DOI: 10.1016/j.ijmultiphaseflow.2019.04.022ISI: 000474496000010Scopus ID: 2-s2.0-85065836366OAI: oai:DiVA.org:ltu-73836DiVA, id: diva2:1313468
Merknad

Validerad;2019;Nivå 2;2019-06-11 (oliekm)

Tilgjengelig fra: 2019-05-03 Laget: 2019-05-03 Sist oppdatert: 2023-09-06bibliografisk kontrollert

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Jayawickrama, Thamali RajikaChishty, Muhammad AqibUmeki, Kentaro

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