Research Article
Feb 1977
Added Mass of Sphere Starting Upward Near Floor
Publication: Journal of the Engineering Mechanics Division
Volume 103, Issue 1
Abstract
A method for suddenly releasing a buoyant sphere under water and measuring its acceleration was used to get experimental added-mass coefficients a short time after release. To show the effect of a plane boundary, the sphere was released zero to six diameters above a rigid floor. By definition the fluid force on an accelerating object may be divided into two parts— that due to viscosity and that which would occur if the fluid had no viscosity. A work-energy method applied to the boundary layers developing on the sphere and floor gave the viscous force at the instant the acceleration was measured. When this was subtracted from the known total force, the resulting experimental added-mass coefficients ranged from 0.83 (sphere very close to floor) to 0.50 (six diameters away). For the same set of starting positions, potential flow calculations gave coefficients from 0.8030 to 0.5000.
Get full access to this article
View all available purchase options and get full access to this article.
Information & Authors
Information
Published In
Journal of the Engineering Mechanics Division
Volume 103 • Issue 1 • February 1977
Pages: 79 - 97
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Feb 1977
Published online: Feb 3, 2021
Permissions
Request permissions for this article.
Authors
Affiliations
Wallis S. Hamilton, F.ASCE
Prof. of Civ. Engrg., Northwestern Univ., Evanston, Ill.
Gerald L. Courtney
Soils Engr., Nevada Testing Lab., Las Vegas, Nev.
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.
Cited by
View Options
Get Access
Access content
Please select your options to get access
Log in/Register
Log in via your institution (Shibboleth)
ASCE Members:
Please log in to see member pricing
Purchase
Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Get Access
Access content
Please select your options to get access
Log in/Register
Log in via your institution (Shibboleth)
ASCE Members:
Please log in to see member pricing
Purchase
Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.