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Related Concept Videos

Hydrostatic Pressure Force on a Curved Surface01:04

Hydrostatic Pressure Force on a Curved Surface

Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
Hydrostatic Pressure Force on a Plane Surface01:04

Hydrostatic Pressure Force on a Plane Surface

When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...

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Related Experiment Video

Updated: May 7, 2026

Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures
07:23

Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures

Published on: November 14, 2025

Ultrasmooth surface polishing based on the hydrodynamic effect.

Wenqiang Peng, Chaoliang Guan, Shengyi Li

    Applied Optics
    |October 3, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Hydrodynamic effect polishing offers a noncontact method for ultrasmooth surface finishing. This technique effectively removes surface defects and improves roughness by utilizing dynamic pressure and shear stress.

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    Published on: December 1, 2014

    Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
    11:20

    Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

    Published on: August 15, 2018

    Related Experiment Videos

    Last Updated: May 7, 2026

    Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures
    07:23

    Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures

    Published on: November 14, 2025

    Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats &amp; Spheres
    13:07

    Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres

    Published on: December 1, 2014

    Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
    11:20

    Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

    Published on: August 15, 2018

    Area of Science:

    • Surface Engineering
    • Materials Science
    • Fluid Dynamics

    Background:

    • Conventional pad polishing methods can cause surface damage.
    • Achieving ultrasmooth surfaces requires advanced, noncontact polishing techniques.

    Purpose of the Study:

    • To investigate the feasibility of hydrodynamic effect polishing for ultrasmooth surfaces.
    • To analyze the material removal mechanism and contour in noncontact polishing.
    • To develop an analytical model for hydrodynamic effect polishing.

    Main Methods:

    • Numerical simulation of dynamic pressure and shear stress distribution.
    • Fixed-point polishing experiments to validate simulation results.
    • Application of a material removal analytic model.

    Main Results:

    • Clearance significantly influences dynamic pressure and shear stress distribution.
    • Material removal rates and contours are governed by dynamic pressure and shear stress.
    • Surface roughness improved to 0.145 nm rms and 0.116 nm Ra on quartz glass.

    Conclusions:

    • Hydrodynamic effect polishing is a feasible noncontact method for ultrasmooth surface finishing.
    • The study provides an analytical model for predicting material removal.
    • The technique successfully removed defects and enhanced surface quality.