k-k sorting on the Multi Mesh of Trees

Rakesh, Nitin; Nitin, Nitin

doi:10.1109/iccae.2010.5451723

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…However, generally, the target thickening time is often based on the objectives of the operator. Commonly reported consistencies are 40, 50, 60, and 70 Bc. − …”

Section: Results and Discussionmentioning

confidence: 99%

Evaluation of Qusaiba Kaolinitic Shale as a Supplementary Cementitious Material in Lightweight Oil-Well Cement Formulation

et al. 2022

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Metakaolin is a supplementary cementitious material produced through the calcination of kaolinitic rocks. The scarcity of high-grade and commercial quantities of kaolinitic-based rocks makes metakaolin expensive. The objective of this study is to evaluate the feasibility of the kaolinitic shale obtained from the mud-rich Qusaiba Member of Saudi Arabia as a source of metakaolin. The rock was dried, ground, and passed through a 75 μm sieve to obtain a fine powder. The powder was calcined at 1202, 1292, 1382, 1472, and 1562 °F for 1 h. The optimum calcination temperature required to convert the material into metakaolin was found to be 1562 °F using X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetry analysis techniques. The analytical techniques indicated that the kaolinitic shale is of high grade and less ordered, which would make it an excellent source of a highly reactive metakaolin. Cement systems designed at 12.5 ppg (1.50 g/cm 3 ) with the metakaolin produced from the Qusaiba kaolinitic shale as 30% cement replacement exhibits mechanical properties that would be ideal for downhole oil-wellbore applications.

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“…However, generally, the target thickening time is often based on the objectives of the operator. Commonly reported consistencies are 40, 50, 60, and 70 Bc. − …”

Section: Results and Discussionmentioning

confidence: 99%

Evaluation of Qusaiba Kaolinitic Shale as a Supplementary Cementitious Material in Lightweight Oil-Well Cement Formulation

et al. 2022

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“…The default values are used for the under-relaxation factors. − In the iteration process, the residuals of continuity, x -velocity, y -velocity, z -velocity, k , and epsilon are controlled at a level, while the energy equation is controlled at a level. The iteration calculation is considered converged when the residuals reach the corresponding residual accuracy …”

Section: Grid Partitioning and Computational Methodsmentioning

confidence: 99%

“…The iteration calculation is considered converged when the residuals reach the corresponding residual accuracy. 33 …”

Section: Grid Partitioning and Computational Methodsmentioning

confidence: 99%

Numerical Study on Enhanced Heat Transfer of Downhole Slotted-Type Heaters for In Situ Oil Shale Exploitation

Sun,

Liu,

Yan

et al. 2023

ACS Omega

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In order to improve the flow state of the heater shell side and enhance the performance evaluation of the heater, this paper proposes a perforated plate-type heater model. Based on Fluent, numerical studies are conducted on the heat transfer performance and shell-side fluid flow characteristics of a perforated plate-type heater. The variations of the heat transfer factor Nu, friction factor f, and evaluation parameter Nu/f 1/3 are analyzed for different helix angles β and ratios of the long and short semiaxes of the circular holes on the heating plate under different Reynolds numbers Re. The results reveal that under the same shell-side Reynolds number Re, the heat transfer factor Nu shows an increasing trend with the increase in the proportion of the helix angle β. The heat transfer factor Nu for the heating plate with the hole shape ratio a/b = 1 does not exhibit significant improvement compared to hole shape ratios a/b = 0.8 and a/b = 0.6, but it increases by 4.87 to 7.07% compared to the hole shape ratio a/b = 0.4 in the perforated plate-type heater. On the other hand, the friction factor f decreases as the helix angle β and the ratio of hole shapes on the heating plate increase. The lowest friction factor f is observed for the helix angle β of 25°and the hole shape ratio a/b = 1 in the perforated plate-type heater. When the helix angle β is 25°and the hole shape ratio is a/b = 1, the evaluation parameter Nu/f 1/3 reaches its highest value, indicating the optimal overall performance of the perforated plate-type heater.

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Embedding a mesh of trees in the crossed cube

Dong

Zhou

et al. 2012

Information Processing Letters

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k-k sorting on the Multi Mesh of Trees

Cited by 5 publications

References 6 publications

Evaluation of Qusaiba Kaolinitic Shale as a Supplementary Cementitious Material in Lightweight Oil-Well Cement Formulation

Evaluation of Qusaiba Kaolinitic Shale as a Supplementary Cementitious Material in Lightweight Oil-Well Cement Formulation

Numerical Study on Enhanced Heat Transfer of Downhole Slotted-Type Heaters for In Situ Oil Shale Exploitation

Embedding a mesh of trees in the crossed cube

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