A pseudo-fluid representation of vertical liquid-coarse solids flow
Vertikalno kretanje tečnosti i čvrstih čestica tretirano kao pseudo-fluid
Апстракт
The pseudo–fluid concept has been applied for the prediction of the pressure gradient and voidage in vertical liquid-coarse solids flow. Treating the flowing mixture as a single homogenous fluid, the correlation for the friction coefficient of the suspension–wall was developed, as was the correlation between the true voidage and the apparent (volumetric) voidage in the transport tube. Experiments were performed using water and spherical glass particles 1.20, 1.94 and 2.98 mm in diameter in a transport tube of 24 mm in diameter. The loading ratio (Gp/Gf) was varied between 0.05 and 1.05 and the fluid superficial velocity was between 0.4 Ut and 4.95 Ut where Ut represents the single particle terminal velocity. The voidage ranged from 0.648 to 0.951 for these ratios. Experimental data for the pressure gradient and voidage from the literature agree well with the proposed correlations.
Za predviđanje gradijenta pritiska i poroznosti pri vertikalnom dvofaznom toku tečnosti i krupnih čvrstih čestica primenjen je koncept pseudofluida. Tretirajući pokretnu smešu tečnosti i čestica kao homogeni fluid, određena je zavisnost za koeficijent trenja suspenzija–zid transportne cevi, kao i zavisnost između stvarne i zapreminske (volumetrijske) poroznosti u transportnoj cevi. Eksperimentalna ispitivanja su izvedena u transportnoj cevi prečnika 24 mm, sa sferičnim staklenim česticama prečnika 1.20, 1.94 i 2.98 mm, pri čemu je kao transportni medijum korišćena voda. Opterećenje toka (Gp/Gf) variralo je između 0.05 i 1.05, dok se površinska brzina fluida kretala od 0.4.Ut do 4.95.Ut, gde je Ut brzina odnošenja usamljene čestice. Za navedene obime opterećenja toka i brzine fluida poroznost u sistemu se kretala od 0.648 do 0.951. Eksperimentalni podaci iz literature za gradijent pritiska i poroznost u dobroj su saglasnosti sa predloženim korelacijama.
Кључне речи:
liquid–solids flow / pseudo–fluid representationИзвор:
Journal of the Serbian Chemical Society, 2005, 70, 5, 775-784Издавач:
- Serbian Chemical Society
DOI: 10.2298/JSC0505775G
ISSN: 0352-5139
WoS: 000230375900012
Scopus: 2-s2.0-31644451951
Институција/група
IHTMTY - JOUR AU - Garić Grulović, Radmila AU - Grbavčić, Željko AU - Arsenijević, Zorana PY - 2005 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/207 AB - The pseudo–fluid concept has been applied for the prediction of the pressure gradient and voidage in vertical liquid-coarse solids flow. Treating the flowing mixture as a single homogenous fluid, the correlation for the friction coefficient of the suspension–wall was developed, as was the correlation between the true voidage and the apparent (volumetric) voidage in the transport tube. Experiments were performed using water and spherical glass particles 1.20, 1.94 and 2.98 mm in diameter in a transport tube of 24 mm in diameter. The loading ratio (Gp/Gf) was varied between 0.05 and 1.05 and the fluid superficial velocity was between 0.4 Ut and 4.95 Ut where Ut represents the single particle terminal velocity. The voidage ranged from 0.648 to 0.951 for these ratios. Experimental data for the pressure gradient and voidage from the literature agree well with the proposed correlations. AB - Za predviđanje gradijenta pritiska i poroznosti pri vertikalnom dvofaznom toku tečnosti i krupnih čvrstih čestica primenjen je koncept pseudofluida. Tretirajući pokretnu smešu tečnosti i čestica kao homogeni fluid, određena je zavisnost za koeficijent trenja suspenzija–zid transportne cevi, kao i zavisnost između stvarne i zapreminske (volumetrijske) poroznosti u transportnoj cevi. Eksperimentalna ispitivanja su izvedena u transportnoj cevi prečnika 24 mm, sa sferičnim staklenim česticama prečnika 1.20, 1.94 i 2.98 mm, pri čemu je kao transportni medijum korišćena voda. Opterećenje toka (Gp/Gf) variralo je između 0.05 i 1.05, dok se površinska brzina fluida kretala od 0.4.Ut do 4.95.Ut, gde je Ut brzina odnošenja usamljene čestice. Za navedene obime opterećenja toka i brzine fluida poroznost u sistemu se kretala od 0.648 do 0.951. Eksperimentalni podaci iz literature za gradijent pritiska i poroznost u dobroj su saglasnosti sa predloženim korelacijama. PB - Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - A pseudo-fluid representation of vertical liquid-coarse solids flow T1 - Vertikalno kretanje tečnosti i čvrstih čestica tretirano kao pseudo-fluid VL - 70 IS - 5 SP - 775 EP - 784 DO - 10.2298/JSC0505775G ER -
@article{ author = "Garić Grulović, Radmila and Grbavčić, Željko and Arsenijević, Zorana", year = "2005", abstract = "The pseudo–fluid concept has been applied for the prediction of the pressure gradient and voidage in vertical liquid-coarse solids flow. Treating the flowing mixture as a single homogenous fluid, the correlation for the friction coefficient of the suspension–wall was developed, as was the correlation between the true voidage and the apparent (volumetric) voidage in the transport tube. Experiments were performed using water and spherical glass particles 1.20, 1.94 and 2.98 mm in diameter in a transport tube of 24 mm in diameter. The loading ratio (Gp/Gf) was varied between 0.05 and 1.05 and the fluid superficial velocity was between 0.4 Ut and 4.95 Ut where Ut represents the single particle terminal velocity. The voidage ranged from 0.648 to 0.951 for these ratios. Experimental data for the pressure gradient and voidage from the literature agree well with the proposed correlations., Za predviđanje gradijenta pritiska i poroznosti pri vertikalnom dvofaznom toku tečnosti i krupnih čvrstih čestica primenjen je koncept pseudofluida. Tretirajući pokretnu smešu tečnosti i čestica kao homogeni fluid, određena je zavisnost za koeficijent trenja suspenzija–zid transportne cevi, kao i zavisnost između stvarne i zapreminske (volumetrijske) poroznosti u transportnoj cevi. Eksperimentalna ispitivanja su izvedena u transportnoj cevi prečnika 24 mm, sa sferičnim staklenim česticama prečnika 1.20, 1.94 i 2.98 mm, pri čemu je kao transportni medijum korišćena voda. Opterećenje toka (Gp/Gf) variralo je između 0.05 i 1.05, dok se površinska brzina fluida kretala od 0.4.Ut do 4.95.Ut, gde je Ut brzina odnošenja usamljene čestice. Za navedene obime opterećenja toka i brzine fluida poroznost u sistemu se kretala od 0.648 do 0.951. Eksperimentalni podaci iz literature za gradijent pritiska i poroznost u dobroj su saglasnosti sa predloženim korelacijama.", publisher = "Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "A pseudo-fluid representation of vertical liquid-coarse solids flow, Vertikalno kretanje tečnosti i čvrstih čestica tretirano kao pseudo-fluid", volume = "70", number = "5", pages = "775-784", doi = "10.2298/JSC0505775G" }
Garić Grulović, R., Grbavčić, Ž.,& Arsenijević, Z.. (2005). A pseudo-fluid representation of vertical liquid-coarse solids flow. in Journal of the Serbian Chemical Society Serbian Chemical Society., 70(5), 775-784. https://doi.org/10.2298/JSC0505775G
Garić Grulović R, Grbavčić Ž, Arsenijević Z. A pseudo-fluid representation of vertical liquid-coarse solids flow. in Journal of the Serbian Chemical Society. 2005;70(5):775-784. doi:10.2298/JSC0505775G .
Garić Grulović, Radmila, Grbavčić, Željko, Arsenijević, Zorana, "A pseudo-fluid representation of vertical liquid-coarse solids flow" in Journal of the Serbian Chemical Society, 70, no. 5 (2005):775-784, https://doi.org/10.2298/JSC0505775G . .