Balance of liquid-phase turbulence kinetic energy equation for bubble-train flow
Апстракт
In this paper the investigation of bubble-induced turbulence using direct numerical simulation (DNS) of bubbly two-phase flow is reported. DNS computations are performed for a bubble-driven liquid motion induced by a regular train of ellipsoidal bubbles rising through an initially stagnant liquid within a plane vertical channel. DNS data are used to evaluate balance terms in the balance equation for the liquid phase turbulence kinetic energy. The evaluation comprises single-phase-like terms (diffusion, dissipation and production) as well Lis the interfacial term. Special emphasis is placed on the procedure for evaluation of interfacial quantities. Quantitative analysis of the balance equation for the liquid phase turbulence kinetic energy shows the importance of the interfacial term which is the only source term. The DNS results are further used to validate closure assumptions employed in modelling of the liquid phase turbulence kinetic energy transport in gas-liquid bubbly flows. In t...his context, the performance of respective Closure relations in the transport equation for liquid turbulence kinetic energy within the two-phase k-epsilon and the two-phase k-l model is CV evaluated.
Кључне речи:
turbulence modelling / turbulence kinetic energy / direct numerical simulation / bubble-train flow / bubble-induced turbulenceИзвор:
Journal of Nuclear Science and Technology, 2004, 41, 3, 331-338Издавач:
- Atomic Energy Soc Japan, Tokyo
DOI: 10.3327/jnst.41.331
ISSN: 0022-3131
WoS: 000221346300013
Scopus: 2-s2.0-2442547779
Институција/група
Inovacioni centarTY - JOUR AU - Ilić, Milica AU - Worner, M AU - Cacuci, Dan G. PY - 2004 UR - https://machinery.mas.bg.ac.rs/handle/123456789/424 AB - In this paper the investigation of bubble-induced turbulence using direct numerical simulation (DNS) of bubbly two-phase flow is reported. DNS computations are performed for a bubble-driven liquid motion induced by a regular train of ellipsoidal bubbles rising through an initially stagnant liquid within a plane vertical channel. DNS data are used to evaluate balance terms in the balance equation for the liquid phase turbulence kinetic energy. The evaluation comprises single-phase-like terms (diffusion, dissipation and production) as well Lis the interfacial term. Special emphasis is placed on the procedure for evaluation of interfacial quantities. Quantitative analysis of the balance equation for the liquid phase turbulence kinetic energy shows the importance of the interfacial term which is the only source term. The DNS results are further used to validate closure assumptions employed in modelling of the liquid phase turbulence kinetic energy transport in gas-liquid bubbly flows. In this context, the performance of respective Closure relations in the transport equation for liquid turbulence kinetic energy within the two-phase k-epsilon and the two-phase k-l model is CV evaluated. PB - Atomic Energy Soc Japan, Tokyo T2 - Journal of Nuclear Science and Technology T1 - Balance of liquid-phase turbulence kinetic energy equation for bubble-train flow EP - 338 IS - 3 SP - 331 VL - 41 DO - 10.3327/jnst.41.331 ER -
@article{ author = "Ilić, Milica and Worner, M and Cacuci, Dan G.", year = "2004", abstract = "In this paper the investigation of bubble-induced turbulence using direct numerical simulation (DNS) of bubbly two-phase flow is reported. DNS computations are performed for a bubble-driven liquid motion induced by a regular train of ellipsoidal bubbles rising through an initially stagnant liquid within a plane vertical channel. DNS data are used to evaluate balance terms in the balance equation for the liquid phase turbulence kinetic energy. The evaluation comprises single-phase-like terms (diffusion, dissipation and production) as well Lis the interfacial term. Special emphasis is placed on the procedure for evaluation of interfacial quantities. Quantitative analysis of the balance equation for the liquid phase turbulence kinetic energy shows the importance of the interfacial term which is the only source term. The DNS results are further used to validate closure assumptions employed in modelling of the liquid phase turbulence kinetic energy transport in gas-liquid bubbly flows. In this context, the performance of respective Closure relations in the transport equation for liquid turbulence kinetic energy within the two-phase k-epsilon and the two-phase k-l model is CV evaluated.", publisher = "Atomic Energy Soc Japan, Tokyo", journal = "Journal of Nuclear Science and Technology", title = "Balance of liquid-phase turbulence kinetic energy equation for bubble-train flow", pages = "338-331", number = "3", volume = "41", doi = "10.3327/jnst.41.331" }
Ilić, M., Worner, M.,& Cacuci, D. G.. (2004). Balance of liquid-phase turbulence kinetic energy equation for bubble-train flow. in Journal of Nuclear Science and Technology Atomic Energy Soc Japan, Tokyo., 41(3), 331-338. https://doi.org/10.3327/jnst.41.331
Ilić M, Worner M, Cacuci DG. Balance of liquid-phase turbulence kinetic energy equation for bubble-train flow. in Journal of Nuclear Science and Technology. 2004;41(3):331-338. doi:10.3327/jnst.41.331 .
Ilić, Milica, Worner, M, Cacuci, Dan G., "Balance of liquid-phase turbulence kinetic energy equation for bubble-train flow" in Journal of Nuclear Science and Technology, 41, no. 3 (2004):331-338, https://doi.org/10.3327/jnst.41.331 . .