Mathematical model of working processes of piston hybrid power machine of volumetric action with reduced fluctuations of gas pressure in discharge line by V. E. Scherba, A. V. Grigor’ev, A. V. Zanin

“…Based on the use of the equation of continuity of motion and energy, taking into account the energy loss for friction and external heat transfer, a mathematical model of the gas flow in the interstage communications of the compressor section is developed. …”
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Research on Soft Rocks for the Construction of Roadbeds for High-Speed Railroad: Effect of Water Soaking Environment by Xiangdong Zhang, Jie Geng, Yuebo Xu, Zhongchao Zhou, Shuai Pang

“…A positive linear correlation was observed between the internal friction angle and the cement slurry filling rate. (4) An increase in the cement slurry filling rate corresponding to the saturated muddy sandstone resulted in an exponential decrease in the settlement deformation value. …”
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Air Heat Pump in Wind Power by L. I. Gretchikhin, A. I. Hutkouski

“…Experimental studies of the operating propeller as a heat pump, taking into account the friction during rotation of the rotor in the stator of the electric generator, were carried out. …”
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Microstructural analysis and preliminary wear assessment of wire arc additive manufactured AA 5083 aluminum alloy for lightweight structures by Prasanna Nagasai Bellamkonda, Maheshwar Dwivedy, Kaushik N.Ch

“…The WAAM AA 5083 aluminum part exhibits a maximum wear rate of 5.22 × 10⁻³ mm³/m and a coefficient of friction of 0.52 at a load of 3.5 kg and 450 rpm. Under these conditions, deep grooves, layer separation, and load-induced deformation are observed. …”
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Temperature influence on the repair of a hardfacing coating using laser metal deposition and assessment of the repair innocuity by Wilfried Pacquentin, Pierre Wident, Jérôme Varlet, Thomas Cailloux, Hicham Maskrot

“…Additive manufacturing (AM) is a proven time- and cost-effective method for repairing parts locally damaged after e.g. repetitive friction wear or corrosion. Repairing a hardfacing coating using AM technologies presents however several simultaneous challenges arising from the complex geometry and a high probability of crack formation due to process-induced stress. …”
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Corrosion and wear study of medium entropy Pb-Sn-Cu alloy for coating application by Gokul M. Pillai, Kuldeep Singh, Shanmugasundaram Thangaraju, Shashinath Jha, Vinod Kumar

“…This study focuses on developing a low-friction coating material using ternary medium entropy alloy using lead (Pb), tin (Sn), and copper (Cu). …”
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Effectiveness of dry needling combined with eccentric strength training in lateral epicondylalgia with trigger points by Sukumar Shanmugam, Lawrence Mathias, Ramprasad Muthukrishnan, Praveen Kumar Kandakurti, Satheeskumar Durairaj

“…Methods For four weeks, the experimental group ( n = 19) received DN with weekly one session, and the control group ( n = 19) received therapeutic ultrasound combined with deep friction massage for 2 sessions per week at the active sites of active MTrPs. …”
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Optimisation of trimethylolpropane ester synthesis from waste cooking oil methyl ester by response surface methodology, and its physicochemical properties and tribological characte... by Teuku Meurah Indra Riayatsyah, Arridina Susan Silitonga, Md Abul Kalam, Islam Md Rizwanul Fattah

“…The TWCOE biolubricant had an acid value of 0.4 mg KOH/g, flash point of 222.2 °C, and viscosity index of 125.30. The coefficient of friction of the TWCOE biolubricant (0.045) was lower than those of the SAE15W40, SAE0W30, and ATF9 lubricants (0.062, 0.088, and 0.089, respectively). …”
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Mechanical Mechanism of Water Injection to Enhance the Stability of Soft Coal by Chuanqi Zhu, Hao Fan, Wanrong Liu, Shaobo Li

“…The cohesive force increases first and then decreases, while the angle of internal friction almost has no change. (4) After reasonable water injection, the shape of liquid bridge in coal body changes into capillary tube, and the liquid bridge force reaches the maximum value, which transforms from a highly unstable bulk to a stable continuum. …”
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MHD flow of Williamson nanofluid using effective similarity variable considering viscous dissipation and thermal radiation over a non-linear stretching surface via OHAM by Muhammad Awais Sherani, Muhammad Sohail, Ibrahim Mahariq, Syed Tehseen Abbas

“…It is observed that λ and M increase the value of skin friction, but −θ'(0), indicating heat transfer efficiency, increases with Pr, Le, and Nbt but declines with Rd and Nc. …”
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Tunnel Back Analysis Based on Differential Evolution Using Stress and Displacement by Joon-Sang An, Kyung-Nam Kang, Ju-Young Choi, Won-Suh Sung, Vathna Suy, Ki-Il Song

“…As a preliminary study, the target variables of the back analysis adopted in this study were the elastic modulus, cohesion, and friction angle of the ground. The back analysis based on the monitored displacement is useful when the displacement is significant due to excavation. …”
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On Cattaneo-Chrystov heat flux model for nanofluid flow on Darcy–Forchheimer porous medium past unsteady stretching cylinder by Sreedhar Sobhanapuram, S.V.V Rama Devi, Charankumar Ganteda, Rajyalakshmi Kottapalli, Vediyappan Govindan, Haewon Byeon, Busayamas Pimpunchat

“…Conversely, larger values of the unstable parameter result in significant wall friction that hinders the nanofluid'smobility. Furthermore, under widely accepted assumptions, the numerical approach found here shows great agreement with several previous efforts. …”
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Experimental Study on the Effect of Addition Micro Additives Zinc Oxide and Graphite Powder at Biodiesel to Decrease the Pressure Drop of Microchannels by Jooned Hendrarsakti, Zido Yuwazama, Putra Andi Kolala, Rico Aditia Prahmana, Alfian Yannu Alfaridzi, Kiki Fadillah Nurul Khotimah, Marianus Beatriks Djala Gili

“…The result affirmed that the friction factor has the same trend as the conventional theory.…”
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Magnetic Field Effects on Convective Heat Transfer of Ferrofluid from a Heated Sphere in Porous Media by Ayesha Aktar, Sharaban Thohura, Md. Mamun Molla

“…Numerical outcomes are then represented in terms of local Nusselt number, velocity, temperature profile, and skin friction coefficient, respectively for a range of porosity parameters, ϵ = 0.4, 0.6, 0.8, magnetic effect parameter or Hartmann number, Ha = 0.0, 1.0, 3.0, 5.0 and the ferroparticle volume fraction coefficients, ϕ = 0%, 2%, 4%, 6%. …”
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Thermohydraulic performance evaluation of a heat exchanger mounted with oval inclined twisted rings by P. Samruaisin, V. Chuwattanakul, P. Thapmanee, M. Kumar, P. Naphon, N. Maruyama, M. Hirota, S. Eiamsa-ard

“…Heat transfer enhancement, friction factor, and thermal enhancement factor tests were conducted under uniform wall heat flux with Reynolds numbers (Re) varying from 6000 to 20,000. …”
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Explosive Performance Assessment of Buried Steel Pipeline by Seyed-Mohammad Seyed-Kolbadi, Mohammad Safi, Ayoub Keshmiri, S. Mahdi S. Kolbadi, Masoud Mirtaheri

“…These results obtain that because of increase of closuring of pipes in soil when internal friction angle increases for a kind of soil, the stress on pipe rim will decrease also. …”
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Functional compensators in machine drives by P. D. Balakin, V. N. Belkov, O. S. Dyundik, I. P. Zgonnik

“…An algorithm for the synthesis of a compensator is given on the example of the basic scheme of a friction planetary gearbox.…”
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Alumina-enriched sunflower bio-oil in machining of Hastelloy C-276: a fuzzy Mamdani model-aided sustainable manufacturing paradigm by Binayak Sen, Abhijit Bhowmik, Gurbhej Singh, Vishwesh Mishra, Shantanu Debnath, Rustem Zairov, Muhammad Imam Ammarullah

“…Abstract With the increasing emphasis on sustainable manufacturing practices, eco-friendly lubricants have gained significant attention to moderate the friction coefficient at the tool-work interface. In line with this, the contemporary study aimed to examine the viability of Alumina-enriched sunflower bio-oil as a metalworking fluid. …”
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Thermodynamics and solar radiative analysis in Jeffery-Hamel flow through non-parallel channel by novel improved residual power series method by Mohamed Bouzidi, Mohsin Ul Haq, Ikram Ullah, Saira Shukat, Hijaz Ahmad, Mohammad Mahtab Alam, Hamid Khan, Marouan Kouki

“…Furthermore, the local skin friction coefficient and the rate of heat transfer are examined for numerous parameters. …”
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Effects of CeO2/Y2O3 rare earth oxides on microstructure and properties of in-situ synthesized WC-reinforced Ni-based cladding layer by Zhang C. X., Sun W. C., Liu E. Y., Liu Y. W., Liu J. P., Zhang B., Xu Y. F., Zhou M. R.

“…Both the cladding layer and the substrate exhibited a mixed-wear mode, and they exhibit adhesive wear in wet friction environments.…”
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