Article
Mechanics
H. Jung, I. A. Frigaard
Summary: This study experimentally investigates the effects of inner cylinder rotation on displacement flow of two Newtonian fluids in a horizontal eccentric annulus. The results show that rotation of the inner cylinder changes the flow behavior and can improve the displacement efficiency. This research provides insights for optimizing displacement flows in various applications.
Article
Chemistry, Physical
Paulo C. F. da Camara, Liszt Y. C. Madruga, Nivia do N. Marques, Rosangela C. Balaban
Summary: The study demonstrates that PVP-based water-based drilling fluids can provide stable rheological parameters under high temperature and high pressure conditions, with good filtration performance and rheological properties.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Mechanics
Rodrigo S. Mitishita, Nile Waldal, Anastasia Vogl, Ian A. Frigaard
Summary: This study experimentally investigated turbulent displacement flows in eccentric annuli, focusing on the effect of a solid obstruction on the narrow side of the annular gap. The findings showed that the obstruction hindered the displacement of the viscoplastic Carbopol solution downstream of it. Decreasing Reynolds numbers through the formulation of xanthan gum solutions also contributed to less effective displacement due to reduced fluctuating stresses. However, at higher eccentricity values, the effect of the obstruction on the displacement of Carbopol appeared to be negligible.
Article
Chemistry, Physical
Fei Liu, Xuewu Wang, Xiaqing Li, Xiaodong Dai, Zhaoxiang Zhang, Daoxu Wang, Ye Wang, Shunyao Jiang
Summary: This study synthesized poly(ionic liquids) (PILs) based on beta-cyclodextrin and investigated its application as a novel fluid loss additive in water-based drilling fluids (WDFs). The PILs exhibited excellent filtration control performance, resulting in significantly reduced fluid loss volume due to the low filtration rate, thickness, and permeability of the PILs/WDFs mud cake.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Thermodynamics
G. Mishra, P. Mishra, R. P. Chhabra
Summary: This study numerically investigates the laminar free convection in yield-pseudoplastic fluids in concentric and eccentric cylindrical annuli. The findings reveal that the eccentric positioning of the heated cylinder enhances heat transfer, while the horizontal shifting of the inner cylinder to an off-centre position has an adverse effect on heat transfer.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Mechanics
Xuesi Gao, Sang Mok Han, Wook Ryol Hwang
Summary: Based on the energy dissipation rate, a systematic method was proposed in this study to quantify the flow characteristics of non-Newtonian fluids in a concentric annulus subjected to pressure-driven and rotational flow. Flow parameters, including the energy dissipation rate coefficient and the effective shear rate coefficient, were introduced to quantify the relationship between pressure drop, flow rate, torque, and rotational speed independent of rheological behaviors. The method was analytically derived and validated for various non-Newtonian fluids through numerical simulations, showing good accuracy in estimating torque, pressure drop, and shear-dependent viscosity.
Article
Energy & Fuels
Ming Tang, Linghao Kong, Shiming He, Guangfu Zhang, Huajun Li, Lang He
Summary: Accurate prediction of annulus pressure drop is of great significance to the safe drilling of deep fractured formations. This study established an analytical model based on the assumption of narrow-slot flow to predict the pressure drop of H-B fluids in the concentric annulus of elliptical wellbore. The main influencing factors were identified and a new prediction method was established.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Quande Wang, Michal Slany, Xuefan Gu, Zhipeng Miao, Weichao Du, Jie Zhang, Chen Gang
Summary: This study focuses on improving the tribological characteristics of water-based drilling fluids by adding graphene-based lubricants. The researchers successfully prepared highly dispersed graphite using a green and simple adsorption approach. The modified graphite significantly improved the lubrication performance of the drilling fluid, and the underlying mechanism was analyzed through various measurements. These findings provide valuable insights for the development of high-performance water-based drilling fluids.
Article
Computer Science, Artificial Intelligence
Abhishek Kumar, Syahrir Ridha, Suhaib Umer Ilyas, Iskandar Dzulkarnain, Agus Pratama
Summary: Mathematical simulation of non-Newtonian fluid flow is an enduring problem with imperative influence on numerous industrial processes. This research proposes a novel algorithm that can efficiently solve the partial differential equation for fluid flow in an irregular geometry. The performance of the algorithm has been validated and shows high decoding capability for the non-Newtonian fluid mechanics.
NEURAL COMPUTING & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Amir Mohammad, Mesfin Belayneh
Summary: In this paper, a simple analytical model was derived to predict the differential pressures caused by the axial movement of pipe in and out of the well. The model exhibited good performance and was compared with experimental data and existing models. However, further testing is required to determine its limitations and application.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Jinliang Liu, Yaoze Cheng, Fengshan Zhou, L. M. Amutenya Evelina, Wenjun Long, Sinan Chen, Lipeng He, Xiaoling Yi, Xin Yang
Summary: The performance and characteristics of bentonite at high temperatures vary significantly, with natural bentonite showing increased viscosity and industrial modified drilling-grade bentonite exhibiting different behaviors. The new standard Q/SY 17009-2019 is more scientific and reasonable in evaluating drilling-grade bentonite, better meeting the actual needs of drilling engineering.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Physics, Multidisciplinary
Farhan Ahmed
Summary: The present study investigates the influence of constant pressure gradient on flow and heat transfer rate of Jeffrey fluid through concentric pipes annular sector duct. Simulation results show that increasing the ratio of relaxation to retardation times, lambda, can improve the friction factor under certain conditions, while the forced convective heat transfer rate remains almost constant in the absence of viscous dissipation. Additionally, the effect of viscous dissipation becomes favorable with the increase in Brinkman number, Br, on heat transfer rate for higher value of lambda at specific radius ratio and apex angle of the concentric pipes annular sector duct.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Energy & Fuels
Ravi Singh, Ramadan Ahmed, Hamidreza Karami, Mustafa Nasser, Ibnelwaleed Hussein
Summary: This study analyzed the turbulent flow of drilling fluid in inclined wells using the Computational Fluid Dynamics (CFD) technique, establishing a correlation for optimizing hole cleaning and managing downhole pressure. The prediction results were validated and showed a discrepancy of up to 10% when compared with simulation data.
Article
Energy & Fuels
Ming Tang, Lang He, Linghao Kong, Shiming He, Taiheng Zhang
Summary: A simplified model for predicting pressure gradient of laminar helical flow in an eccentric annulus with yield-power-law fluids has been established in this paper. The validation of the simplified model has been investigated by comparing results with computational fluid dynamic simulations, existing experimental measurements, and numerical model. The predictions of the simplified model show good agreement with CFD and experimental results within +/- 10% error bars for power-law and yield-power-law fluids in both concentric and eccentric annuli.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Polymer Science
Dmitry Nikushchenko, Valery Pavlovsky, Elena Nikushchenko
Summary: In this article, a generalization of Newton's formula for shear stress in a fluid is presented by expressing it in the form of a power-law equation. The rheological relation is generalized to describe flow in both laminar and turbulent regimes. Analytical solutions are obtained for simple shear flows, which are found to be in good agreement with experimental data. This approach proves advantageous compared to modern differential turbulence models.
Article
Construction & Building Technology
E. Karakosta, L. Lagkaditi, S. ElHardalo, A. Biotaki, V. C. Kelessidis, M. Fardis, G. Papavassiliou
CEMENT AND CONCRETE RESEARCH
(2015)
Review
Energy & Fuels
Zisis Vryzas, Vassilios C. Kelessidis
Article
Chemistry, Physical
V. C. Kelessidis, E. Poulakakis, V. Chatzistamou
APPLIED CLAY SCIENCE
(2011)
Article
Chemistry, Physical
Yadeta C. Chemeda, George E. Christidis, N. M. Tauhid Khan, Eleni Koutsopoulou, Vicky Hatzistamou, Vassilios C. Kelessidis
APPLIED CLAY SCIENCE
(2014)
Article
Engineering, Chemical
Mao Zaisha, Yang Chao, Vassilios C. Kelessidis
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2012)
Article
Engineering, Chemical
R. Rooki, F. Doulati Ardejani, A. Moradzadeh, V. C. Kelessidis, M. Nourozi
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2012)
Article
Chemistry, Physical
Vassilios C. Kelessidis, Vasiliki Hatzistamou
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2011)
Article
Chemistry, Physical
Meisam Mirarab Razi, Vassilios C. Kelessidis, Roberto Maglione, Majid Ghiass, Mohammad Ali Ghayyem
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2014)
Article
Energy & Fuels
V. C. Kelessidis, R. Maglione, G. Bandelis
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2010)
Article
Mechanics
Reza Rooki, Faramarz Doulati Ardejani, Ali Moradzadeh, Hossein Mirzaei, Vassilios Kelessidis, Roberto Maglione, Mahmood Norouzi
KOREA-AUSTRALIA RHEOLOGY JOURNAL
(2012)
Article
Chemistry, Physical
Zisis Vryzas, Vassilios C. Kelessidis, Lori Nalbantian, Vassilis Zaspalis, Dimitrios I. Gerogiorgis, Yiming Wubulikasimu
APPLIED CLAY SCIENCE
(2017)
Proceedings Paper
Engineering, Chemical
Simon I. Reilly, Zisis Vryzas, Vassilios C. Kelessidis, Dimitrios I. Gerogiorgis
26TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING (ESCAPE), PT A
(2016)
Proceedings Paper
Engineering, Environmental
Zisis Vryzas, Omar Mahmoud, Hisham Nasr-El-Din, Vassilis Zaspalis, Vassilios C. Kelessidis
PROCEEDINGS OF THE ASME 35TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING , 2016, VOL 8
(2016)
Article
Metallurgy & Metallurgical Engineering
V. C. Kelessidis
JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY
(2011)