scholarly journals Effect of Surface Roughness on the Stick-slip Behavior of Magnetic Field Controlled-dipolar Suspensions in Simple Linear Shear Mode

2016 ◽  
Vol 67 ◽  
pp. 03032
Author(s):  
Jile Jiang ◽  
Zhimin Zhang ◽  
Gang Hu ◽  
Yonggang Meng ◽  
Yu Tian
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Shear Mode ◽  
Stick Slip ◽  
Linear Shear ◽  
Effect Of Surface

Mathematical modelling of the effect of surface roughness on magnetic field profiles in type II superconductors

2013 ◽  
Vol 85 (1) ◽  
pp. 149-177 ◽  
Author(s):  
Michael Lindstrom ◽  
Brian Wetton ◽  
Rob Kiefl
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Mathematical Modelling ◽  
Type Ii ◽  
Type Ii Superconductors ◽  
Effect Of Surface

scholarly journals Effect of Surface Roughness on the Squeeze Film Characteristics of Circular Plates in the Presence of Conducting Couplestress Fluid and Transverse Magnetic Field

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Syeda Tasneem Fathima ◽  
N. B. Naduvinamani ◽  
J. Santhosh Kumar ◽  
B. N. Hanumagowda
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Transverse Magnetic ◽  
Squeeze Film ◽  
Circular Plates ◽  
Roughness Effects ◽  
Modified Equations ◽  
Load Carrying ◽  
Film Characteristics ◽  
Effect Of Surface

The combined effect of surface roughness and magnetic field on the performance characteristic of the circular plates lubricated with conducting couplestress fluid (CCSF) has been studied. On the basis of the Christensen Stochastic model, the generalized stochastic Reynold’s equation is derived. Modified equations for the nondimensional pressure, load load-carrying capacity, and squeeze film time are derived. The results are presented both numerically and graphically and compared with conducting smooth surface case. It is observed that the surface roughness effects are more pronounced for couplestresses as compared to nonconducting Newtonian fluid (NCNF) in the presence of magnetic field.

Effect of surface roughness on the response of thickness-shear mode resonators in liquids

1993 ◽  
Vol 65 (20) ◽  
pp. 2910-2922 ◽  
Author(s):  
Stephen J. Martin ◽  
Gregory C. Frye ◽  
Antonio J. Ricco ◽  
Stephen D. Senturia
Keyword(s):  
Surface Roughness ◽  
Shear Mode ◽  
Thickness Shear Mode ◽  
Thickness Shear ◽  
Effect Of Surface

Effect of Surface Roughness on the Magnetic Field Profile in the Meissner State of a Superconductor

2016 ◽  
Vol 29 (6) ◽  
pp. 1499-1507 ◽  
Author(s):  
Michael Lindstrom ◽  
Alex C. Y. Fang ◽  
Robert F. Kiefl
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Meissner State ◽  
Field Profile ◽  
Magnetic Field Profile ◽  
The Magnetic Field ◽  
Effect Of Surface

scholarly journals Stick–slip friction of gecko-mimetic flaps on smooth and rough surfaces

2015 ◽  
Vol 12 (104) ◽  
pp. 20141346 ◽  
Author(s):  
Saurabh Das ◽  
Nicholas Cadirov ◽  
Sathya Chary ◽  
Yair Kaufman ◽  
Jack Hogan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Silica Surface ◽  
Surface Forces ◽  
Surface Forces Apparatus ◽  
Stick Slip ◽  
Theoretical Approaches ◽  
Frictional Forces ◽  
Modified Surface ◽  
Glass Surfaces ◽  
Effect Of Surface

The discovery and understanding of gecko ‘frictional-adhesion’ adhering and climbing mechanism has allowed researchers to mimic and create gecko-inspired adhesives. A few experimental and theoretical approaches have been taken to understand the effect of surface roughness on synthetic adhesive performance, and the implications of stick–slip friction during shearing. This work extends previous studies by using a modified surface forces apparatus to quantitatively measure and model frictional forces between arrays of polydimethylsiloxane gecko footpad-mimetic tilted microflaps against smooth and rough glass surfaces. Constant attachments and detachments occur between the surfaces during shearing, as described by an avalanche model. These detachments ultimately result in failure of the adhesion interface and have been characterized in this study. Stick–slip friction disappears with increasing velocity when the flaps are sheared against a smooth silica surface; however, stick–slip was always present at all velocities and loads tested when shearing the flaps against rough glass surfaces. These results demonstrate the significance of pre-load, shearing velocity, shearing distances, commensurability and shearing direction of gecko-mimetic adhesives and provide us a simple model for analysing and/or designing such systems.

The effect of surface roughness on AES depth profile.

Shinku ◽  
1987 ◽  
Vol 30 (10) ◽  
pp. 793-798 ◽  
Author(s):  
Masao HIRASAKA ◽  
Masao HASHIBA ◽  
Toshiroh YAMASHINA
Keyword(s):  
Surface Roughness ◽  
Depth Profile ◽  
Effect Of Surface

Effect of Surface Roughness on the Pressure Generation in a Finite Rough Hydrodynamic Journal Bearing under Micropolar Lubrication in Steady-State

2016 ◽  
Vol 15 (0) ◽  
pp. 39
Author(s):  
Gautam Kumar ◽  
Sujeet Kumar Jha ◽  
Ujjal Baidya ◽  
Santanu Das ◽  
Sanjoy Das
Keyword(s):  
Surface Roughness ◽  
Steady State ◽  
Journal Bearing ◽  
Hydrodynamic Journal Bearing ◽  
Micropolar Lubrication ◽  
Effect Of Surface

Effect of surface sealant on surface roughness and bacterial adhesion of bulk-fill composites

2021 ◽  
pp. 096739112110055
Author(s):  
Gunce Ozan ◽  
Meltem Mert Eren ◽  
Cansu Vatansever ◽  
Ugur Erdemir
Keyword(s):  
Surface Roughness ◽  
Bacterial Adhesion ◽  
Confocal Laser ◽  
High Caries Risk ◽  
Two Samples ◽  
Significant Difference ◽  
Restorative Materials ◽  
Surface Sealants ◽  
Surface Sealant ◽  
Effect Of Surface

Surface sealants are reported to ensure surface smoothness and improve the surface quality of composite restorations. These sealants should also reduce the bacterial adhesion on composite surfaces however, there is not much information regarding their performance on bulk-fill composite materials. The aim of this study was to evaluate the effect of surface sealant application on surface roughness and bacterial adhesion of various restorative materials. Disc-shaped samples were prepared from a compomer, a conventional composite and three bulk-fill composites. Specimens of each group were divided into two groups (n = 9): with/without surface sealant (Biscover LV, [BLV]). Surface roughness values were examined by profilometry and two samples of each group were examined for bacterial adhesion on a confocal laser scanning microscope (CLSM). Bacterial counts were calculated by both broth cultivation and microscopic images. Results were analyzed with one-way ANOVA and Bonferroni/Dunn tests. Following the BLV application, there was a decrease in the surface roughness values of all groups however, only Tetric N-Ceram Bulk and Beautifil-Bulk groups showed significantly smoother surfaces (p < 0.001). There were no significant differences among material groups without BLV application. Evaluating bacterial adhesion after BLV application, conventional composite had the lowest values among all followed by the compomer group. Beautifil-Bulk had significantly the highest bacterial adhesion (p < 0.05), followed by Tetric N-Ceram Bulk group. Without BLV application, there was no significant difference among bacterial adhesion values of groups (p > 0.05). CLSM images showed cell viability in groups. Bulk-fill composites showed higher bacterial adhesion than conventional composite and compomer materials. The surface sealant was found to be highly effective in lowering bacterial adhesion, but not so superior in smoothing the surfaces of restorative materials. So, surface sealants could be used on the restorations of patients with high caries risk.

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