Numerical simulation of the mixing behaviour of hot and cold fluids in the rectangular T-junction with/without an impeller

Huang, Kexin; Su, Bo; Li, Tong; Huang, Ke; Mei, Lin; Wang, Qiuwang

doi:10.1016/j.applthermaleng.2021.117942

Cited by 72 publications

(8 citation statements)

References 30 publications

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“…It has been noticed that misalignment has a distinct effect on crack propagation rate [ 61 , 62 , 63 ]. It has been observed that the defect initiates from the edge and grows along the rolling direction and continues to spread with respect to time [ 64 , 65 , 66 ]. Whenever the rollers pass over the surface of the crack then the changes were observed and it mainly happened in the form of changes in vibration signal which are generated by different stress levels.…”

Section: Resultsmentioning

confidence: 99%

Identification of localized defects and fault size estimation of taper roller bearing (NBC_30205) with signal processing using the Shannon entropy method in MATLAB for automobile industries applications

Kumar¹,

Singh²,

Sharma³

et al. 2022

Heliyon

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Section: Resultsmentioning

confidence: 99%

Identification of localized defects and fault size estimation of taper roller bearing (NBC_30205) with signal processing using the Shannon entropy method in MATLAB for automobile industries applications

Kumar¹,

Singh²,

Sharma³

et al. 2022

Heliyon

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“…With the simplicity and lower cost of the non-uniform magnetic fields in industrial applications, this topic is attractive in thermal engineering science 21,22 . The experimental investigations of the non-uniform magnetic fields have been presented in limited research since the measurement technique of heat transfer in this specific condition is a tough task [23][24][25][26] . Unlike a uniform magnetic fields, the simulation of the non-uniform magnetic source requires high skill for the implementation of the source term in the main governing equations in the modeling process [27][28][29][30] .…”

Section: Influence Of Non-uniform Magnetic Field On the Thermal Effic...mentioning

confidence: 99%

Influence of non-uniform magnetic field on the thermal efficiency hydrodynamic characteristics of nanofluid in double pipe heat exchanger

Azizi

Bahramkhoo

Kazemi

2023

Sci Rep

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Enhancement of the heat transfer rate inside the double pipe heat exchangers is significant for industrial applications. In present work, the usage of non-uniform magnetic field on the heat transfer rate of the nanofluid flow streamed inside double pipe heat exchangers are comprehensively studied. Computational technique of CFD is used for the visualization of the nanofluid hydrodynamic in existence of the magnetic source. Influences of the magnetic intensity and nanofluid velocity on the heat transfer are also presented. Simple algorithm is used for the modeling of the incompressible nanofluid flow with addition of magnetic source. Presented results show that magnetic source intensifies the formation of the circulation in the gap of the inner tube and consequently, heat transfer is enhanced in our domain. Comparison of different geometries of tube reveals that the triangle tube is more efficient for improvement of the heat transfer of nanofluid flow. Our results indicate that heat transfer in the tube with triangular shape is more than other configurations and its performance is 15% more than smooth tube.

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“…The world’s marine oil resources account for 34% of the world’s total oil resources, of which the proven reserves are about 38 billion tons [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. With oil reserves on land and in shallow seas decreasing year by year, the development of deep-water oil and gas resources has received attention.…”

Section: Introductionmentioning

confidence: 99%

A Temperature-Sensitive Polymeric Rheology Modifier Used in Water-Based Drilling Fluid for Deepwater Drilling

Wang

Sun

Zhang

et al. 2022

Gels

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Rheology modifiers are essential for the flat rheology of water-based drilling fluids in deepwater. The low temperature thickening of deepwater water-based drilling fluids results in dramatic rheological changes in the 20–30 °C range. To address such problems, NIPAM with a self-polymerized product LCST of 32–35 °C was selected as the main body for synthesis. While introducing the hydrophilic monomer AM to enhance the thickening properties, the hydrophobic monomer BA was selected to reduce the LCST of the product. In this paper, a temperature-sensitive polymeric rheology modifier (PNBAM) was synthesized by emulsion polymerization using N-isopropyl acrylamide, acrylamide, and butyl acrylate as monomers. The PNBAM was characterized using infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and nuclear magnetic resonance hydrogen spectroscopy (NMR). The rheological properties, temperature resistance, and salt resistance of PNBAM in the base fluid (BF) were tested. The performance of PNBAM in the drilling fluid system was also evaluated, and a water-based drilling fluid system of flat rheology for deepwater was formulated. The rheological modification mechanism of PNBAM was analyzed by turbidity analysis, particle size analysis, and zeta analysis. Experimental results show that PNBAM has good rheological properties. PNBAM is temperature resistant to 150 °C, salt-resistant to 30 wt%, and calcium resistant to 1.0 wt%. PNBAM also has good flat rheology characteristics in drilling fluid systems: AV4°C:AV25°C = 1.27, PV4°C:PV25°C = 1.19. Mechanistic analysis showed that the LCST (Lower Critical Solution Temperature) of 0.2 wt% PNBAM in an aqueous solution was 31 °C. Through changes in hydrogen bonding forces with water, PNBAM can regulate its hydrophilic and hydrophobic properties before and after LCST, which thus assists BF to achieve a flat rheological effect. In summary, the temperature-sensitive effect of PNBAM has the property of enhancing with increasing temperature. While the tackifying effect of conventional rheology modifiers diminishes with increasing temperature, the temperature-sensitive effect of PNBAM gives it an enhanced thickening effect with increasing temperature, making it a more novel rheology modifier compared to conventional treatment additives. After LCST, compared to conventional rheology modifiers (XC), PNBAM has a more pronounced thermo-thickening effect, improving the main rheological parameters of BF by more than 100% or even up to 200% (XC less than 50%). This contributes to the flat rheology of drilling fluids. PNBAM has good application prospects and serves as a good reference for the development of other rheology modifiers.

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Numerical simulation of the mixing behaviour of hot and cold fluids in the rectangular T-junction with/without an impeller

Cited by 72 publications

References 30 publications

Identification of localized defects and fault size estimation of taper roller bearing (NBC_30205) with signal processing using the Shannon entropy method in MATLAB for automobile industries applications

Identification of localized defects and fault size estimation of taper roller bearing (NBC_30205) with signal processing using the Shannon entropy method in MATLAB for automobile industries applications

Influence of non-uniform magnetic field on the thermal efficiency hydrodynamic characteristics of nanofluid in double pipe heat exchanger

A Temperature-Sensitive Polymeric Rheology Modifier Used in Water-Based Drilling Fluid for Deepwater Drilling

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