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Journal articles on the topic 'Pressure and Tension in the Contact Surface'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Dou, Yi Hua, Xing Wang, Yang Yu, and Xiang Tong Yang. "Analysis of Sealing Ability of Premium Tubing Connection under Axial Alternating Tension Load." Advanced Materials Research 634-638 (January 2013): 3569–72. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3569.

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In order to know the sealing ability under axial alternating tension load, a 88.9mm×6.45mm P110 premium tubing connection is established with multiple linear elastic plastic finite element model, stress and contact pressure on sealing surface and torque shoulder are analyzed under axial alternating tension load and 80 MPa inner pressure. The results show that tubing connection slide by the axial tension, while the maximum contact pressure on seal surface reduced. With the increasing of alternating cycle, the maximum equivalent stress on seal surface increased and the maximum contact pressure o

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2

Magnin, A., J. M. Piau, J. Frene, D. Bois, and M. Godet. "Hydrodynamics of Wire-Drum Contact." Journal of Tribology 109, no. 4 (1987): 679–83. http://dx.doi.org/10.1115/1.3261537.

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The hydrodynamics of a wire-drum contact is analyzed using theoretical techniques developed in foil bearing studies. Analytical solutions and numerical solutions are obtained. Results show that: when for a given minimum film thickness the wire tension increases, the pressure arc extent decreases and reaches a minimum for certain wire tension level; the pressure distribution is independent of wire tension for large values of tension; and the active pressure zone depends strongly on film thickness.

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3

Li, Shaoheng, Weike Yuan, Yue Ding, and Gangfeng Wang. "Indentation load–depth relation for an elastic layer with surface tension." Mathematics and Mechanics of Solids 24, no. 4 (2018): 1147–60. http://dx.doi.org/10.1177/1081286518774090.

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The load–depth relation is a fundamental requisite in nanoindentation tests for thin layers; however, the effects of surface tension are seldom included. This paper concerns micro-/nano-sized indentation by a rigid sphere of a bonded elastic layer. The surface Green’s function with the incorporation of surface tension is first derived by applying the Hankel integral transform, and subsequently used to formulate the governing integral equation for the axisymmetric contact problem. By using a numerical method based on the Gauss–Chebyshev quadrature formula, the singular integral equation is solv

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4

Priliepo, Nataliia. "Interactions of a Deformable Wheel with a Deformable Support Surface." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 13, no. 9 (2024): 1–4. https://doi.org/10.35940/ijitee.I9944.13090824.

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<strong>Abstract:</strong> The article analyzes methods for solving problems on the drive systems' compacting effect on the support surface (soil). There are analyzed results of studies on the distribution of pressures and tensions in the contact surfaces depending on the propulsors' mechanical properties and the support surface's material. The article also includes an analysis of methods for formalizing contact surfaces and constructing mathematical models for determining the distribution of pressures, deformations, and tensions in the contact surfaces. Numerical methods for solving contact p

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5

Moriarty, J. A., and E. L. Terrill. "Mathematical modelling of the motion of hard contact lenses." European Journal of Applied Mathematics 7, no. 6 (1996): 575–94. http://dx.doi.org/10.1017/s0956792500002588.

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In this paper we examine the movement of hard contact lenses on the eye. In so doing, we take into account hydrodynamic forces underneath the lens, as well as surface tension forces at the lens periphery. This involves solving for the free surface of the tear film away from the lens in order to determine the magnitudes of the pressure and surface tension forces on the lens. The analysis, which assumes quasi-steady motion, is carried out in both two and three dimensions.

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6

Yu, Yang, Zhan Qu, Yinping Cao, Yihua Dou, and Juncheng Li. "Sealability Analyses of Premium Connections Characterized by a Surface Fractal Function." Applied Sciences 13, no. 11 (2023): 6467. http://dx.doi.org/10.3390/app13116467.

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With the development of high-pressure, high-temperature wells, the sealability of premium connections is being threatened by heavy loads. For the sake of researching the sealability of premium connections at the microlevel on the sealing surface, a rough profile was characterized according to a fractal function, and the influence of the fractal parameters of contact behavior on the rough surface was analyzed. A full-size premium connection model with a fractal surface FEM was established using ABAQUS software to analyze the Von Mises stress and contact pressure, and the sealability was then an

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7

Cui, Weihua, Weilin Gu, Hui Wang, and Chunlei Liu. "Research on Improvement of Clamping Device for Online Nondestructive Tensile Testing of Braided Wire Rope." Journal of Physics: Conference Series 2459, no. 1 (2023): 012043. http://dx.doi.org/10.1088/1742-6596/2459/1/012043.

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Abstract The online nondestructive tensile testing machine can crush wire ropes, during the safety tension test of braided wire ropes. To solve this problem, this paper analyzes the reasons for crushing phenomena from the aspects of static simulation and geometric analysis of wire ropes. In terms of static simulation of the tensile process, the equivalent stress, contact pressure and contact gap cloud map of the wire rope in the clamping jaw range are obtained. It is found that both equivalent stress and contact pressure of the wire rope reach maximum values at the transition section between t

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8

HADIDIMASOULEH, ROGHAYEH, MAZIAR SAHBA YAGHMAEE, REZA RIAHIFAR, and BABAK RAISSI. "MODELING OF THE SURFACE TENSION OF COLLOIDAL SUSPENSIONS." Surface Review and Letters 24, no. 04 (2016): 1750050. http://dx.doi.org/10.1142/s0218625x17500500.

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Surface tension is one of the fundamental properties of the colloids, which can be altered by concentration and size of colloidal particles. In the current work, modeling of the surface tension of suspension as it would be analyzed by maximum bubble pressure method has been performed. A new modified equation to correlate the surface tension with the bubble pressure is derived by applying fundamental thermodynamic relation considering the presence of particles in suspension and curvature of the interface between the particles and bubbles inside liquid. Moreover, the change of particles concentr

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9

Huang, Long Cang, Yin Ping Cao, Yang Yu, and Yi Hua Dou. "Analysis and Comparison of Seal Ability of Premium Tubing Connections under Axial Alternating Load." Applied Mechanics and Materials 423-426 (September 2013): 2035–39. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.2035.

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In the process of oil and gas well production, tubing connection stand the axial alternating load during open well, shut well and fluid flow. In order to know premium connection seal ability under the loading, two types of P110 88.9mmx6.45mm premium tubing connections which called A connection and B connection are performed with finite element analysis, in which contact pressures and their the regularities distribution on sealing surface are analyzed. The results show that with the increasing of cycle number, the maximum contact pressures on sealing surface of both A connection and B connectio

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10

Zhao, Yumeng, Boyoung Jeong, Dong-Hun Kang, and Sheng Dai. "Impacts of motile Escherichia coli on air-water surface tension." E3S Web of Conferences 205 (2020): 08003. http://dx.doi.org/10.1051/e3sconf/202020508003.

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Immiscible multiphase flow in porous media is largely affected by interfacial properties, manifested in contact angle and surface tension. The gas-liquid surface tension can be significantly altered by suspended particles at the interface. Particle-laden interfaces have unique properties, for example, a lower surface tension of interfaces laden with surfactants or nanoparticles. This study investigates the impacts of a motile bacterium Escherichia coli (E. coli, strain ATCC 9637) on the air-water surface tension. Methods of the maximum bubble pressure, the du Noüy ring, and the pendant droplet

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11

Song, Kai Wei, Guo Fu Chen, Hang Zhang, Cong Li Shi, and Jia Yang. "Mechanism Research of Drying Shrinkage of Cement Pastes Based on the Contact Angle." Applied Mechanics and Materials 670-671 (October 2014): 391–95. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.391.

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Capillary tention is one of the driving forces of shrinkage of cement-based materials, which is related to distribution of pore size, surface tension of pore water, contact angle of pore walls and so on. There are some appropriate test methods for pore diameter and surface tension of cement-based materials, but the contact angle of pore water is rarely related to. This paper showed a new method to test the contact angle of cement-based materials which is based on the principle of thin-layer wicking about surface physical chemistry. Combining Washburn equation x2=(Refft/2) , the contact angle o

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12

Volodymyr, Kovbasa, and Priliepo Nataliia. "Interactions of a Deformable Wheel with a Deformable Support Surface." International Journal of Innovative Technology and Exploring Engineering 13, no. 9 (2024): 1–4. http://dx.doi.org/10.35940/ijitee.i9944.13090824.

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The article analyzes methods for solving problems on the drive systems' compacting effect on the support surface (soil). There are analyzed results of studies on the distribution of pressures and tensions in the contact surfaces depending on the propulsors' mechanical properties and the support surface's material. The article also includes an analysis of methods for formalizing contact surfaces and constructing mathematical models for determining the distribution of pressures, deformations, and tensions in the contact surfaces. Numerical methods for solving contact problems that have been used

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13

Kozachok, Oleh, and Rostyslav Martynyak. "Contact problem for wavy surfaces in the presence of an incompressible liquid and a gas in interface gaps." Mathematics and Mechanics of Solids 24, no. 11 (2018): 3381–93. http://dx.doi.org/10.1177/1081286518781679.

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This paper presents a study on smooth elastic contact between two semi-infinite elastic bodies, one of which has a wavy surface, for the case when there are an incompressible liquid, not wetting the surfaces of the bodies, at the central region of each interface gap and a gas under constant pressure at the edges of each gap. Due to the surface tension of the liquid, a pressure drop occurs in the liquid and the gas, which is described by the Laplace formula. The formulated contact problem is reduced to a singular integral equation (SIE) with the Hilbert kernel, which is transformed into a SIE w

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14

Gilavdary, Igor, Samir Mekid, and Natalia Riznookaya. "Phenomenological Laws of Single Point Contact: Pre-Rolling Contact Resistance through Pendulum." Lubricants 11, no. 2 (2023): 88. http://dx.doi.org/10.3390/lubricants11020088.

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The development results of a single-point contact system set up as a pendulum to study the laws of rolling resistance to contacting bodies at a distance significantly reduced compared to the elastic contact spot size. The designed device uses a physical pendulum sustained by only one ball on a flat polished surface. The problem of stability of the pendulum swing plane is solved. A phenomenological theory of rolling resistance is described. The surface tension of solids on the contact zone, parameters of the frequency-independent internal friction and the pressure of the adhesion forces are fou

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15

Sakit Abbasov, Sakit Abbasov, and Sevda Aliyeva Sevda Aliyeva. "CALCULATION OF MOUNTAIN PRESSURE TRANSMITTED TO THE CASING TAKING INTO ACCOUNT THE RHEOLOGICAL PROPERTIES OF THE AREA AROUND THE WELL." ETM - Equipment, Technologies, Materials 10, no. 02 (2022): 133–42. http://dx.doi.org/10.36962/etm10022022-133.

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Reliable lining of the walls of oil and gas wells with casing is one the main problems. Precise estimation of the load impact on casings forms the basis of well walls strengthening and economic use of pipelines. From this point considering rheological properties of rocks, cement coating, and complex rheological condition the analytic expressions have been obtained to calculate contact pressure determined between zones. Keywords: casing, rocks pressure, contact pressure, viscous-elastic medium, nuclear, Volter equations, approximation, tension, deformation.

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16

Bogacheva, Svetlana Yu, Aleksandr V. Meshcheryakov, and Tatiana L. Gol'ceva. "ANALYTICAL MODELLING OF THREAD TENSION ON A SYSTEM OF SURFACES." Technologies & Quality 57, no. 3 (2023): 14–19. http://dx.doi.org/10.34216/2587-6147-2022-3-57-14-19.

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The paper deals with the determination of the tension of a flexible thread using numerical methods. The equilibrium of a homogeneous inextensible heavy thread, when statically interacting with a system of surfaces of various shapes, has been simulated. The paper presents the results of analytical modelling of thread tension. The formulas for calculating the tension at any point of thread by characteristic sections and the normal pressure at critical points have been derived. An example of calculation of thread tension on two smooth cylindrical surfaces and a rough surface of a cone simulating

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17

Yu, Zhong Qi, Li Sun, and Jing Gao. "Experimental and Numerical Study on Surface Damage of Dual-Phase Steel Sheet during Stamping." Applied Mechanics and Materials 598 (July 2014): 23–27. http://dx.doi.org/10.4028/www.scientific.net/amm.598.23.

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In this study, a U-channel bending test with tension were used to evaluate the surface damage resistance of dual-phase (DP) steel against heat treated Mo-Cr cast iron, and a numerical simulation model of the U-channel bending were developed to analyze the interface contact pressure on formed part that is an important influencing factor of surface damage. Investigation results for two bare steel sheets DP780 and DP590 demonstrate that DP780 steel showed more severe surface damage on formed part, and that for the steel DP780 greater interface contact pressure is induced as a result of effect of

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18

Ignatiev, Аleksey A., Valeriy M. Gotovtsev, Denis V. Gerasimov, and Pavel B. Razgovorov. "The Modeling of Interfacial Contacts in Composites Using the Sitting Drop - Solid Body System as an Example." Key Engineering Materials 869 (October 2020): 400–407. http://dx.doi.org/10.4028/www.scientific.net/kem.869.400.

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The paper presents an analysis of positions, which a theory of a liquid wetting a solid surface is based on, using the sitting drop equilibrium as an example. Certain inconsistencies are indicated in these positions, which is the subject of the discussion. The paper explains why the interfacial tension of solid-gas has no effect on the equilibrium of a drop. It proposes a mechanism to form a liquid-solid interface layer, the tensor of interfacial tensions of which is represented as a pressure tensor. It is established that the surface tension of the interface layer is variable and changes in m

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19

EVDOKIMOV, S. I., T. E. GERASIMENKO, and V. I. GOLIK. "FLOTATION OF GOLD MICRODISPERSIONS ON CARRIER MINERALS." News of the Tula state university. Sciences of Earth 2, no. 1 (2023): 382–400. http://dx.doi.org/10.46689/2218-5194-2023-2-1-382-400.

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Theoretical considerations are given to the specific regularities of water wetting of a microinhomogeneous surface of a solid body and the appearance of linear tension (twodimensional pressure) as a result of the curvature of the contact line of three phases during flotation. An expression is obtained for determining the critical radius of the wetting perimeter, which corresponds to the possibility of compensating the linear tension along the surface of the sphere. Here it is appropriate to draw an analogy between the dependence of surface tension on the radius of a liquid drop and the depende

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20

Pogorzelski, Stanislaw, Paulina Janowicz, Krzysztof Dorywalski, Katarzyna Boniewicz-Szmyt, and Pawel Rochowski. "Wettability, Adsorption and Adhesion in Polymer (PMMA)—Commercially Available Mouthrinse System." Materials 16, no. 17 (2023): 5753. http://dx.doi.org/10.3390/ma16175753.

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The study concerns the evaluation of the physicochemical and thermo-adsorptive surface properties of six commercially available mouthrinses, particularly surface tension, surface activity, partitioning coefficient, critical micellar concentration, Gibbs excesses at interfaces, surface entropy, and enthalpy. The aim was to quantify their effect on the adhesion and wettability of a model poly(methyl methacrylate) (PMMA) polymer. The adsorptive and thermal surface characteristics were derived from surface tension (γLV) vs. concentration and temperature dependences. Polymer surface wettability was

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21

Durbin, Paul A. "On the wind force needed to dislodge a drop adhered to a surface." Journal of Fluid Mechanics 196 (November 1988): 205–22. http://dx.doi.org/10.1017/s0022112088002678.

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The dislodging by dynamic pressure forces of a drop adhered by surface tension to a plane is analysed. An integro-differential equation describing the drop shape is solved numerically and the critical Weber number as a function of contact angle hysteresis is found.

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22

Ratnakar, Ram R., Cesar A. Mantilla, and Birol Dindoruk. "Impact of Asphaltenes on Contact-Angle Variations and Surface Topography and Composition." SPE Journal 25, no. 03 (2020): 1082–95. http://dx.doi.org/10.2118/190385-pa.

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Summary The asphaltene precipitation affects the rock/fluid interaction in a live-oil reservoir, which has a significant effect on oil recovery and flow in the production network. In this work, we examine the changes in interfacial properties (such as contact angle between the live-oil, brine, and quartz system) as well as surface topography and compositions caused by asphaltene precipitations that are related to pressure-depletion processes. The experimental method is based on the pendant-drop-shape method using a high-resolution camera for quantitative image analysis and a high-resolution di

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23

Zhao, Yan, Liangying Wen, Yuefeng Zhang, Bo Liu, Huan Yang, and Qingyu Deng. "Experimental and Numerical Study on Dynamic Characteristics of Droplet Impacting on a Hot Tailings Surface." Processes 10, no. 9 (2022): 1766. http://dx.doi.org/10.3390/pr10091766.

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It is quite important to clearly understand the fluid dynamic process of water droplets impacting on a hot extracted titanium tailings surface for the recovery and utilization of tailings. In this research, the finite volume simulations of the droplet impingement were developed by applying the volume-of-fluid method and were validated against experimental results. Droplet-impact experiments were performed by using a high-speed camera. The effects of the Weber number, surface tension value, and contact angle on the spreading factor were quantitatively investigated, and the distributions of pres

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24

Wang, Gang. "Finite Element Simulations of Free Surface Flows With Surface Tension in Complex Geometries." Journal of Fluids Engineering 124, no. 3 (2002): 584–94. http://dx.doi.org/10.1115/1.1466458.

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The finite-element program, ANSYS/FLOTRAN, has been enhanced at Release 5.7 to predict free surface flows with surface tension in complex geometries. The two-dimensional incompressible Navier-Stokes and energy equations are solved in both Cartesian and axisymmetric coordinate systems. At Release 5.6, the free surface capabilities have been incorporated into ANSYS/FLOTRAN using the CLEAR-VOF algorithm. The main contribution of this work is to implement a surface tension model into ANSYS/FLOTRAN to study free surface flows with surface tension in complex geometries. Both normal and tangential co

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25

Pogorzelski, Stanislaw, Katarzyna Boniewicz-Szmyt, Maciej Grzegorczyk, and Pawel Rochowski. "Wettability of Metal Surfaces Affected by Paint Layer Covering." Materials 15, no. 5 (2022): 1830. http://dx.doi.org/10.3390/ma15051830.

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The aim of the work was to quantify the surface wettability of metallic (Fe, Al, Cu, brass) surfaces covered with sprayed paints. Wettability was determined using the contact angle hysteresis approach, where dynamic contact angles (advancing ΘA and receding ΘR) were identified with the inclined plate method. The equilibrium, ΘY, contact angle hysteresis, CAH = ΘA − ΘR, film pressure, Π, surface free energy, γSV, works of adhesion, WA, and spreading, WS, were considered. Hydrophobic water/solid interactions were exhibited for the treated surfaces with the dispersive term contribution to γSV equ

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26

Trzepiecinski, Tomasz. "A Study of the Coefficient of Friction in Steel Sheets Forming." Metals 9, no. 9 (2019): 988. http://dx.doi.org/10.3390/met9090988.

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The aim of this paper was to compare the tribological properties of a deep drawing quality steel sheet using the three commonly used friction tests, i.e., the strip drawing test, draw bead test, and bending under tension test. All tests have been carried out using a specially designed friction simulator. The test material was a 0.8-mm-thick DC04 steel sheet, commonly used in the automotive industry. Uniaxial tensile tests have been carried out to characterise the mechanical properties of the specimens. Furthermore, measurements of the sheet surface topography have been carried out to character

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27

Shukhratzoda, Ganjina. "Efficient Design of the Sewing Machine's Shuttle Thread Tension Regulator." Interactive science, no. 5 (51) (June 20, 2020): 48–50. http://dx.doi.org/10.21661/r-541192.

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The paper presents the tension regulator of the Shuttle thread of the sewing machine, which consists of an arc-shaped plate spring, has two holes, the first for fixing the screw to the side surface of the bobbin cap and the second for the adjusting screw. In this case, the width of the plate spring along the entire length is the same. A disadvantage of the known design of the Shuttle thread tension regulator is that it is not possible to provide thread tension due to changes in the pressure force of the plate spring along its length in the areas of contact with the thread passing between the p

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28

Loo, M. "A Model Analysis of Tire Behavior Under Vertical Loading and Straight-Line Free Rolling." Tire Science and Technology 13, no. 2 (1985): 67–90. http://dx.doi.org/10.2346/1.2150989.

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Abstract A structural analog, consisting of a flexible circular ring under tension with a nest of radially arranged linear springs and dampers, is developed as a pneumatic tire model. The model is concerned with the prediction of the tire's vertical load-deflection characteristics and its free rolling resistance. The mathematical formulation of the boundary of the model's region of contact with a smooth hard surface is based on approximations made using the theory of a tensioned string supported by an elastic foundation. Forces developed within the contact region are computed from geometrical

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29

HEIL, MATTHIAS. "Minimal liquid bridges in non-axisymmetrically buckled elastic tubes." Journal of Fluid Mechanics 380 (February 10, 1999): 309–37. http://dx.doi.org/10.1017/s0022112098003760.

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This study investigates the existence and stability of static liquid bridges in non-axisymmetrically buckled elastic tubes. The liquid bridge which occludes the tube is formed by two menisci which meet the tube wall at a given contact angle along a contact line whose position is initially unknown. Geometrically nonlinear shell theory is used to describe the deformation of the linearly elastic tube wall in response to an external pressure and to the loads due to the surface tension of the liquid bridge. This highly nonlinear problem is solved numerically by finite element methods.It is found th

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30

Guo, Lei, Shu Sheng Zhang, and Lin Cheng. "Study for Bubble Dynamics of Nucleate Boiling in Narrow Channels." Advanced Materials Research 123-125 (August 2010): 499–502. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.499.

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Two different types of channels are investigated which have I- and Z-shaped cross-sections with a width of 2mm. Using the numerical simulation method, the influence of wall contact angle to the process of bubble generating and growth up is studied, and the relationship between different channel shapes and pressure drop is also investigated. In the calculation process, the effects of gravity, surface tension and wall adhesion are taken into account. It is found that wall contact angle has a great influence to the morphology of bubbles. The smaller the wall contact angle is, the rounder the bubb

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31

Tsai, Jhy Cherng, and Wen Tsung Wang. "Effects of Surface Cleanness, Bonding Pressure and Contact Area of ACF on Interfacial Impedance of Chip on Glass Bonding in Flat Panel Display Assembly." Key Engineering Materials 364-366 (December 2007): 618–23. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.618.

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Chip on glass (COG) bonding using Anisotropic Conductive Film (ACF) is the best process for assembling ICs on thin substrate glass with fine pitch in current practice. This paper investigates the effects of surface cleanness of the substrate, bonding pressure and contact area of COG bonding with ACF on interfacial impedance (II) via experiments. Indium tin oxide (ITO), 350±15nm in thickness, coated on 0.4mm glass is used as the substrate with φ4μm ACF particle in the experiment. Surface cleanness is measured by wetting tension, an alternative measurement of surface energy. Experiments with thr

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32

Flores Gerónimo, J., A. Hernández-Machado, and E. Corvera Poiré. "Contact line dynamics of pulsatile fluid interfaces modulated by patterned substrates." Physics of Fluids 34, no. 5 (2022): 052001. http://dx.doi.org/10.1063/5.0087810.

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We study the dynamics of microfluidic fronts driven by pulsatile pressures in the presence of patches of hydrophilic wetting on the walls of the confining media. To do so, we use a recently developed phase-field model that takes inertia into account. We track the interface position in channels with different spacing between the patches and observe that the smaller the spacing, the faster the advancement of the front. We find that the wetting patterning induces a modulating dynamics of the contact line that causes an effective wetting, which in turn determines the modulation of the interface ve

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33

Musehane, Ndivhuwo, and Rhameez Herbst. "Numerical Investigation of Different Dynamic Contact Angle Models for a Droplet Impacting a Surface in OpenFOAM." Mapta Journal of Mechanical and Industrial Engineering (MJMIE) 3, no. 1 (2019): 9–17. http://dx.doi.org/10.33544/mjmie.v3i1.96.

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Computational Fluid Dynamics (CFD) is used to study the spreading process of a water droplet with a radius of 0.00275mm impacting a wax surface at a velocity of 1.18msâˆ’1 . This type of flow is considered to be Multiphase, incompressible, laminar, surface tension dominated and is governed by the Navier stokes and continuity equations. To accurately model the spreading process 3 different contact angle models are investigated, two of which take into account the moving contact line. The governing equations are solved using the open source C++ library OpenFOAM, which uses a Finite Volume Method

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34

Pogorzelski, Stanisław, Paulina Janowicz, Krzysztof Dorywalski, Katarzyna Boniewicz-Szmyt, and Paweł Rochowski. "Adsorption, Adhesion, and Wettability of Commercially Available Cleansers at Dental Polymer (PMMA) Surfaces." Materials 17, no. 19 (2024): 4755. http://dx.doi.org/10.3390/ma17194755.

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This study aims to evaluate the adsorptive, adhesive, and wetting energetic properties of five commercially available cleansers in contact with model dental polymer (PMMA). It was assumed that the selected parameters allow for determining the optimal concentration and place of key component accumulation for antibacterial activity in the bulk liquid phase and prevention of oral plaque formation at the prosthetic material surface. The adsorptive (Gibbs’ excesses ΓLV, critical micellar concentration) and thermal (entropy and enthalpy) surface characteristics originated from surface tension γLV(T)

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35

Boduroglu, Sebnem, and Rashid Bashir. "Review of Capillary Rise Experiments for Surface-Active Solutes in the Subsurface." Geotechnics 2, no. 3 (2022): 706–30. http://dx.doi.org/10.3390/geotechnics2030034.

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Surface-active solutes that exist in the subsurface either naturally (humic acid) or as a result of anthropogenic activities (alcohols, surfactants, PFAS) alter the hydraulic and geotechnical properties of the unsaturated porous media. The alteration of properties is the result of concentration-dependent surface tension, and/or density, and the contact angle effects. These effects are manifested in the form of changes in water retention and conduction and changes in the suction component of the shear strength. Differences in the spatial distribution of these solutes in the subsurface result in

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36

Heil, M. "Airway Closure: Occluding Liquid Bridges in Strongly Buckled Elastic Tubes." Journal of Biomechanical Engineering 121, no. 5 (1999): 487–93. http://dx.doi.org/10.1115/1.2835077.

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This paper is concerned with the airway closure problem and investigates the quasi-steady deformation characteristics of strongly collapsed (buckled) airways occluded by liquid bridges of high surface tension. The airway wall is modeled as a thin-walled elastic shell, which deforms in response to an external pressure and to the compression due to the surface tension of the liquid bridge. The governing equations are solved numerically using physiological parameter values. It is shown that axisymmetric configurations are statically unstable, as are buckled tubes whose opposite walls are not in c

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Peng, Wei, and Bharat Bhushan. "Sliding Contact Analysis of Layered Elastic/Plastic Solids With Rough Surfaces." Journal of Tribology 124, no. 1 (2001): 46–61. http://dx.doi.org/10.1115/1.1401018.

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A three-dimensional numerical model is presented to investigate the quasi-static sliding contact behavior of layered elastic/plastic solids with rough surfaces. The model is applicable for both single-asperity contact and multiple-asperity contacts. The surface deformation is obtained based on a variational principle. The surface and subsurface stresses in the layer and the substrate are determined with a Fast Fourier transformation (FFT) based scheme and von Mises and principal tensile stresses are computed accordingly. Contact statistics, such as fractional contact area, maximum pressure/E2

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Zhang, Ying, Zhanghua Lian, Mi Zhou, and Tiejun Lin. "Viscoelastic behavior of a casing material and its utilization in premium connections in high-temperature gas wells." Advances in Mechanical Engineering 10, no. 12 (2018): 168781401881745. http://dx.doi.org/10.1177/1687814018817452.

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At the high or extra-high temperatures in a natural gas oilfield, where the premium connection is employed by casing, gas leakage in the wellbore is always detected after several years of gas production. As the viscoelastic material’s mechanical properties change with time and temperature, the relaxation of the contact pressure on the connection sealing surface is the main reason for the gas leakage in the high-temperature gas well. In this article, tension-creep experiments were conducted. Furthermore, a constitutive model of the casing material was established by the Prony series method. Mor

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ANTKOWIAK, A., N. BREMOND, S. LE DIZÈS, and E. VILLERMAUX. "Short-term dynamics of a density interface following an impact." Journal of Fluid Mechanics 577 (April 19, 2007): 241–50. http://dx.doi.org/10.1017/s0022112007005058.

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A tube filled with a perfectly wetting liquid falls axially under its own weight. In its gravity-free reference frame, the liquid interface is deformed by surface tension into a hemispherical shape. On impact of the tube on a rigid floor, the interface curvature reverses violently, forming a concentrated jet. If the contact angle at the tube wall is such that the interface is flat, the liquid rebounds as a whole with the tube, with no deformation. We analyse this phenomenon using an impulse pressure description, providing an exact description of the initial liquid velocity field at the impact,

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Rosky, Elise, Will Cantrell, Tianshu Li, Issei Nakamura, and Raymond A. Shaw. "Molecular simulations reveal that heterogeneous ice nucleation occurs at higher temperatures in water under capillary tension." Atmospheric Chemistry and Physics 23, no. 18 (2023): 10625–42. http://dx.doi.org/10.5194/acp-23-10625-2023.

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Abstract. Heterogeneous ice nucleation is thought to be the primary pathway for the formation of ice in mixed-phase clouds, with the number of active ice-nucleating particles (INPs) increasing rapidly with decreasing temperature. Here, molecular-dynamics simulations of heterogeneous ice nucleation demonstrate that the ice nucleation rate is also sensitive to pressure and that negative pressure within supercooled water shifts freezing temperatures to higher temperatures. Negative pressure, or tension, occurs naturally in water capillary bridges and pores and can also result from water agitation

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Makhovskaya, Yu Yu. "Influence of Capillary Adhesion on the Sliding of a Cylinder Along the Surface of an Elastic Solid Taking Account of Wetting Hysteresis." Известия Российской академии наук. Механика твердого тела, no. 1 (August 29, 2024): 168–84. http://dx.doi.org/10.31857/s1026351924010095.

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The contact problem of steady sliding of a rigid cylinder over an elastic half-space in the presence of liquid menisci is considered, taking into account the hysteresis of the contact angle, which leads to different adhesion conditions at the entrance to the contact and at the exit from it. The problem was considered in a flat formulation and was solved by reducing it to the Riemann–Hilbert problem. An analytical expression for the contact pressure and a system of four equations for the numerical determination of the coordinates of the ends of the contact area and the meniscus zones are obtain

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Luiz, Valmir Dias, Anderson Júnior dos Santos, Marcelo Araújo Câmara, and Paulo César de Matos Rodrigues. "Influence of Different Contact Conditions on Friction Properties of AISI 430 Steel Sheet with Deep Drawing Quality." Coatings 13, no. 4 (2023): 771. http://dx.doi.org/10.3390/coatings13040771.

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This article aims to investigate the influence of different contact conditions on the friction properties of an Nb-stabilized AISI 430 ferritic stainless-steel sheet with deep drawing quality. Three tribological tests were performed: pin-on-disk, bending under tension, and strip-tension test. Moreover, counter samples of a hard metal (WC-12%Co) with surface finishes of 0.27 and 0.54 µm were used in the friction tests under dry and lubricated conditions. The influence of the texture and relative elongation of the strip on formability also were investigated. A comparative analysis of the results

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Prasher, Ravi S. "Surface Chemistry and Characteristics Based Model for the Thermal Contact Resistance of Fluidic Interstitial Thermal Interface Materials." Journal of Heat Transfer 123, no. 5 (2001): 969–75. http://dx.doi.org/10.1115/1.1388301.

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Microprocessor powers are increasing at a phenomenal rate, which requires very small thermal resistance between the die (chip) and the ambient, if the current economical methods of conduction and convection cooling are to be utilized. A typical thermal solution in flip chip technology utilizes two levels of thermal interface materials: between the die and the heat spreader, and between the heat spreader and the heat sink. Phase change materials and thermal greases are among the most prominent interstitial thermal interface materials (TIM) used in electronic packaging. These TIMs are typically

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Tu, Chengxu, Qincan Yang, Yeyu Chen, et al. "Anisotropic Spreading of Bubbles on Superaerophilic Straight Trajectories beneath a Slide in Water." Water 12, no. 3 (2020): 798. http://dx.doi.org/10.3390/w12030798.

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Although the bubble contacting a uniformly superaerophilic surface has caused concern due to its application potential in various engineering equipment, such as mineral flotation, very little is known about the mechanism of how the bubble spreads on a surface with anisotropic superaerophilicity. To unveil this mystery, we experimentally studied the anisotropic behavior of a bubble (2 mm in diameter) spreading on the superaerophilic straight trajectories (SALTs) of different widths (0.5 mm–5 mm) in water using a high-speed shadowgraphy system. The 1–3 bounces mostly happened as the bubble appro

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Zhang, Lixin, Songhang Zhang, Shuheng Tang, et al. "Molecular Dynamics Unveiled: Temperature–Pressure–Coal Rank Triaxial Coupling Mechanisms Governing Wettability in Gas–Water–Coal Systems." Processes 13, no. 7 (2025): 2209. https://doi.org/10.3390/pr13072209.

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Water within coal reservoirs exerts dual effects on methane adsorption–desorption by competing for adsorption sites and reducing permeability. The bound water effect, caused by coal wettability, significantly constrains coalbed methane (CBM) production, rendering investigations into coal wettability crucial for efficient CBM development. Compared with other geological formations, coals are characterized by a highly developed microporous structure, making the CO2 sequestration mechanism in coal seams closely linked to the microscale interactions among gas, water, and coal matrixes. However, the

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Saini, Dayanand, and Dandina N. Rao. "Line Tension-Based Modification of Young's Equation for Rock-Oil-Brine Systems." SPE Reservoir Evaluation & Engineering 12, no. 05 (2009): 702–12. http://dx.doi.org/10.2118/113321-pa.

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Summary The two-century-old Young's equation has been widely used in petroleum engineering to depict the reservoir wettability in terms of contact angle, which is a function of surface free energies of the system. For solid/liquid/vapor (S/L/V) systems, Young's equation has been modified in the recent literature to include a line-tension term. This modification was sought to accommodate the imbalance of intermolecular forces experienced by the three-phase confluence zone. Also, Young's equation does not account for the vertical component of liquid/vapor surface tension. The present study aims

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Peng, Wei, Qing You, Xiaoqiang Liu, et al. "Enhance Oil Recovery in Fracture-Cave Carbonate Reservoirs Using Zwitterion-Anionic Composite Surfactant System." Energies 18, no. 2 (2025): 383. https://doi.org/10.3390/en18020383.

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The carbonate fracture-cave reservoir in the Tahe oilfield, China, encounters development challenges because of its substantial burial depth (exceeding 5000 m). Its characteristics are low permeability, pronounced heterogeneity, extensive karst cavern systems, diverse connection configurations, and intricate spatial distribution. Prolonged conventional water flooding leads to predominant water channels, resulting in water channeling and limited sweep efficiency. Surfactant flooding is usually adopted in these conditions because it can mitigate water channeling and enhance sweep efficiency by l

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He, Min, Qiu Yu Zhang, and Ji Ying Guo. "Synthesis and Characterization of Water Based Acrylic Pressure Sensitive Adhesive of Surface Protection Tape." Advanced Materials Research 306-307 (August 2011): 1785–91. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1785.

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The water based acrylic pressure sensitive adhesive was synthesized by seeded pre-emulsion polymerization, the influence of the amount of seeded pre-emulsion, and tri-functional aziridine crosslinker on the properties of the adhesive were studied. It was found that with the increase of the amount of seeded pre-emulsion, latex particle size decreases, contrasted with the increase of the viscosity, surface tension and contact angle of the emulsion; The aging performance of the adhesive can be significantly improved with the increase of the content of the crosslinker; compared with high temperatu

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Lin, J. F., and S. C. Chen. "Calculations of the Meniscus Force and the Contact Force Formed in the Microcontacts of a Rough Surface and a Smooth, Rigid Surface with a Thin Water Film." Journal of Mechanics 24, no. 1 (2008): 1–11. http://dx.doi.org/10.1017/s1727719100001519.

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ABSTRACTA present model is developed to calculate the adhesion meniscus force due to a rough surface with surface asperity in contact with a smooth, rigid flat covered by a thin water film. The original thickness of this film before surface contacts is dependent upon the relative humidity in the air. Microcontact deformations of surface asperities in the elastic, elastoplastic, and fully plastic regimes are included in the present model under a normal load. The new water film thickness under the condition of microcontact deformations is considered changing with the normal load, and it is obtai

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Samara, H., T. V. Ostrowski, F. Ayad Abdulkareem, E. Padmanabhan, and P. Jaeger. "Carbon dioxide adsorption and interaction with formation fluids of Jordanian unconventional reservoirs." Journal of Petroleum Exploration and Production Technology 12, no. 3 (2021): 811–23. http://dx.doi.org/10.1007/s13202-021-01333-9.

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AbstractShales are mostly unexploited energy resources. However, the extraction and production of their hydrocarbons require innovative methods. Applications involving carbon dioxide in shales could combine its potential use in oil recovery with its storage in view of its impact on global climate. The success of these approaches highly depends on various mechanisms taking place in the rock pores simultaneously. In this work, properties governing these mechanisms are presented at technically relevant conditions. The pendant and sessile drop methods are utilized to measure interfacial tension an

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