Influence of Curvature and Torsion on the Friction Factor of Helical Pipe Flow
Anup Kumer Datta,
Marzia Yesmin,
Anindita Paul,
Md. Sifuzzaman
Issue:
Volume 6, Issue 2, December 2022
Pages:
30-38
Received:
24 June 2022
Accepted:
25 July 2022
Published:
5 August 2022
DOI:
10.11648/j.ae.20220602.11
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Abstract: Three-dimensional (3D) direct numerical simulations (DNS) were used to investigate the friction factor of helical pipe for an extensive range of curvature, torsion parameter, and the Reynolds number. In order to explore the friction factor of the helical pipe, performed steady solutions by steady 3D calculations, where the friction factor was calculated in the appearance of well-developed flow regions, being in good agreement with the experimental data. It is found that the tendency of the friction factor of the helical pipe sharply upturns when weak rotational forces due to the pitch-induced torsion are provided then reduces after taking a global maximum value of the friction factor, and finally slowly approaches that of a straight pipe when strong rotational forces gradually appears. After a comprehensive analysis of the ongoing exploration over the parametric ranges the existence of global maximum peak of the friction factor obtained whatever the values of curvature and Reynolds number. It is interesting that the present paper explored the bound of torsion parameter where the friction factor of the helical pipe is applicable to the toroidal pipe and straight pipe. For finite values of curvature over the extensive ranges, there occurs an interaction between Reynolds number and rotational forces, when various interesting phenomena arises, which reveals the crucial importance of the curvature and torsion parameter in the dynamics of helical pipe flow.
Abstract: Three-dimensional (3D) direct numerical simulations (DNS) were used to investigate the friction factor of helical pipe for an extensive range of curvature, torsion parameter, and the Reynolds number. In order to explore the friction factor of the helical pipe, performed steady solutions by steady 3D calculations, where the friction factor was calcu...
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Unethical Geotechnical Practice, Building Collapse and Failure of Infrastructures in Nigeria: A Call for Separate Geotechnical Consultant on Infrastructural Projects
Moshood Niyi Tijani,
Fidelis Ankwo Abija
Issue:
Volume 6, Issue 2, December 2022
Pages:
39-49
Received:
29 November 2021
Accepted:
10 January 2022
Published:
29 September 2022
DOI:
10.11648/j.ae.20220602.12
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Abstract: All structures are founded either on or in soil or rock and design of all engineering structures is based on material properties. The alarming increase in the incidences of building collapse in Nigeria can be linked to the failure of foundation soils, apart from poor quality of construction materials in some cases. Under a structure, a foundation footing column can rest on a firm subgrade while another can be founded on a weak, highly compressible and collapsible soil. Hence, subsurface lithologic profile of the soils underlying a structure is important for safe design and sustainable infrastructure. In the Niger Delta region, correlation of the borehole logs revealed occurrence of peat and peaty clays from the ground surface to a depth ranging from 1.5 – 10m and can extend up to 35 – 42m. Under such geological condition, knowledge of the origin and implicitly the behaviour of the soil under different conditions of saturation; and seasonal wetting and drying cycles; and their implications on structural settlement, material composition of the structure and effects on corrosion etc. are required for safe and economic design. The designer of every project therefore expects minimum specified properties from the geotechnical investigation and interpretation of the results since design is fit to purpose and in-situ soil or rock cannot be changed except being improved upon. Therefore, in the wake of a number of reported cases of professional incompetence and unethical geotechnical practices, a good geotechnical investigation report should provide the soil lithologic profile, basic engineering geological properties and their interpretations with recommendations and design implications including ground control conditions during construction. This study highlights that Geotechnical Consultant should be assigned to all infrastructural development projects in the Nigerian construction industry.
Abstract: All structures are founded either on or in soil or rock and design of all engineering structures is based on material properties. The alarming increase in the incidences of building collapse in Nigeria can be linked to the failure of foundation soils, apart from poor quality of construction materials in some cases. Under a structure, a foundation f...
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Pattern Effect for Oil Reservoir Waterflooding Using Smart Well
Mahlon Kida Marvin,
Aliyu Buba Ngulde,
Abdulhalim Musa Abubakar
Issue:
Volume 6, Issue 2, December 2022
Pages:
50-56
Received:
9 July 2022
Accepted:
26 September 2022
Published:
11 October 2022
DOI:
10.11648/j.ae.20220602.13
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Abstract: Waterflooding is a primary enhanced oil recovery involving the injection of water into an oil-gas rich reservoir to increase production capacity. Waterflooding is one of the most used enhanced oil recovery technique due to the fact that water is readily available and cheap to maintain. However, with the efficacy of implementing waterflooding recovery technique, only about 35% of the original oil in place (OOIP) is produced. This research is aimed at investigating the effect of placement pattern for non-conventional or smart wells. Comparison is made with respect to previous study where which conventional wells are used. Three cases were investigated on the basis of recovery and complexities in field development. It was observed from this study that conventional wells are not a good candidate for oil well productivity as compared to non-conventional (smart) wells. Conventional wells also pose a limitation to the economic value of the reservoir due to poor well contact. The first, second and third case recorded an NPV of $7.5 trillion, $7.59 trillion and $8.81 trillion respectively. Implementing smart wells also curtailed an early water breakthrough by about 70%. An average gain of 99.7% was also recorded for all cases as against previous study. These results indicated the efficiency of implementing smart wells over conventional wells.
Abstract: Waterflooding is a primary enhanced oil recovery involving the injection of water into an oil-gas rich reservoir to increase production capacity. Waterflooding is one of the most used enhanced oil recovery technique due to the fact that water is readily available and cheap to maintain. However, with the efficacy of implementing waterflooding recove...
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