TY - JOUR
T1 - Investigation of longitudinal and transverse dispersion in stable displacements with a high viscosity and density contrast between the fluids
AU - Alkindi, Abdullah
AU - Al-Wahaibi, Yahya
AU - Bijeljic, Branko
AU - Muggeridge, Ann
N1 - Funding Information:
The authors gratefully acknowledge the financial support from Petroleum Development Oman (PDO) . Thanks are also due to Sultan Qaboos University for providing some laboratory equipment. Graham Nash is thanked for constructing the Perspex boxes used for the bead packs. This paper has benefitted considerably from the constructive criticism and questions of an anonymous reviewer.
PY - 2011
Y1 - 2011
N2 - Transverse and longitudinal dispersion in gravity stable, favourable viscosity ratio flows are investigated and compared with earlier data obtained for miscible fluids and for tracer flow. Data from laboratory measurements of longitudinal dispersion in low viscosity ratio (8.63 × 10- 4) and high density contrast (471 kg m-3) displacements are compared with literature data for more modest viscosity ratios and density differences and with earlier theoretical analysis. The longitudinal dispersivity was reduced by a factor of 2 for flows influenced by gravity. This reduction was relatively insensitive to the magnitude of the density contrast and the flow rate, for Peclet numbers less than 100 and found to be consistent with earlier theoretical predictions. Additional transverse dispersion data was obtained for fluids with a density contrast of 225 kg m-3 and a matched viscosity ratio over a range of Peclet numbers (1 < Pe < 1000). A similar reduction in transverse dispersivity in gravity stable flow, independent of Peclet number, was observed and found to be consistent with observations in the literature for more modest density contrasts.
AB - Transverse and longitudinal dispersion in gravity stable, favourable viscosity ratio flows are investigated and compared with earlier data obtained for miscible fluids and for tracer flow. Data from laboratory measurements of longitudinal dispersion in low viscosity ratio (8.63 × 10- 4) and high density contrast (471 kg m-3) displacements are compared with literature data for more modest viscosity ratios and density differences and with earlier theoretical analysis. The longitudinal dispersivity was reduced by a factor of 2 for flows influenced by gravity. This reduction was relatively insensitive to the magnitude of the density contrast and the flow rate, for Peclet numbers less than 100 and found to be consistent with earlier theoretical predictions. Additional transverse dispersion data was obtained for fluids with a density contrast of 225 kg m-3 and a matched viscosity ratio over a range of Peclet numbers (1 < Pe < 1000). A similar reduction in transverse dispersivity in gravity stable flow, independent of Peclet number, was observed and found to be consistent with observations in the literature for more modest density contrasts.
KW - Dispersion
KW - Gravity effects
KW - Laboratory experiments
KW - Longitudinal dispersion
KW - Miscible displacement
KW - Mixing
KW - Transverse dispersion
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U2 - 10.1016/j.jconhyd.2010.06.006
DO - 10.1016/j.jconhyd.2010.06.006
M3 - Article
C2 - 20619925
AN - SCOPUS:79251638271
SN - 0169-7722
VL - 120-121
SP - 170
EP - 183
JO - Journal of Contaminant Hydrology
JF - Journal of Contaminant Hydrology
IS - C
ER -