Cavitation in high-capacity tensiometers: effect of water reservoir surface roughness

Meghdad Bagheri; Mohammad Rezania; Mohaddeseh Mousavi Nezhad

doi:10.1680/jgere.17.00016

Cavitation in high-capacity tensiometers: effect of water reservoir surface roughness

Meghdad Bagheri
, Mohammad Rezania
, Mohaddeseh Mousavi Nezhad

University of Warwick

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

157 Downloads (Pure)

Abstract

High-capacity tensiometers (HCTs) are sensors made to measure negative pore water pressure (suction) directly. In this paper, a new approach is proposed to expand the range and duration of suction measurements for a newly designed HCT. A new technique is employed to reduce significantly the roughness of the diaphragm’s surface on the water reservoir side in order to minimise the possibility of gas nuclei development and the subsequent early cavitation at the water–diaphragm interface. The procedures employed for the design, fabrication, saturation and calibration of the new tensiometers are explained in detail. Furthermore, the performance of the developed HCTs is examined based on a series of experiments carried out on a number of unsaturated clay specimens. An improvement in maximum sustainable suction in the range of 120–150% of their nominal capacity was obtained from different surface treatment methods. Moreover, the results show an improvement of up to 177% for the long-term stability of measurements, compared to the developed ordinary HCTs with untreated diaphragms.

Original language	English
Pages (from-to)	81-95
Number of pages	15
Journal	Geotechnical Research
Volume	5
Issue number	2
DOIs	https://doi.org/10.1680/jgere.17.00016
Publication status	Published - 18 Jun 2018

Bibliographical note

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Keywords

Field testing & monitoring
Geotechnical engineering
Strength and testing of materials

Access to Document

10.1680/jgere.17.00016Licence: CC BY

PublishedFinal published version, 1.82 MBLicence: CC BY

Cite this

@article{f466e4e3ed0643549bbaca551bf8764a,

title = "Cavitation in high-capacity tensiometers: effect of water reservoir surface roughness",

abstract = "High-capacity tensiometers (HCTs) are sensors made to measure negative pore water pressure (suction) directly. In this paper, a new approach is proposed to expand the range and duration of suction measurements for a newly designed HCT. A new technique is employed to reduce significantly the roughness of the diaphragm{\textquoteright}s surface on the water reservoir side in order to minimise the possibility of gas nuclei development and the subsequent early cavitation at the water–diaphragm interface. The procedures employed for the design, fabrication, saturation and calibration of the new tensiometers are explained in detail. Furthermore, the performance of the developed HCTs is examined based on a series of experiments carried out on a number of unsaturated clay specimens. An improvement in maximum sustainable suction in the range of 120–150\% of their nominal capacity was obtained from different surface treatment methods. Moreover, the results show an improvement of up to 177\% for the long-term stability of measurements, compared to the developed ordinary HCTs with untreated diaphragms.",

keywords = "Field testing \& monitoring, Geotechnical engineering, Strength and testing of materials",

author = "Meghdad Bagheri and Mohammad Rezania and \{Mousavi Nezhad\}, Mohaddeseh",

note = "This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright {\textcopyright} and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. ",

year = "2018",

month = jun,

day = "18",

doi = "10.1680/jgere.17.00016",

language = "English",

volume = "5",

pages = "81--95",

journal = "Geotechnical Research",

issn = "2052-6156",

publisher = "ICE Publishing",

number = "2",

}

TY - JOUR

T1 - Cavitation in high-capacity tensiometers

T2 - effect of water reservoir surface roughness

AU - Bagheri, Meghdad

AU - Rezania, Mohammad

AU - Mousavi Nezhad, Mohaddeseh

N1 - This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

PY - 2018/6/18

Y1 - 2018/6/18

N2 - High-capacity tensiometers (HCTs) are sensors made to measure negative pore water pressure (suction) directly. In this paper, a new approach is proposed to expand the range and duration of suction measurements for a newly designed HCT. A new technique is employed to reduce significantly the roughness of the diaphragm’s surface on the water reservoir side in order to minimise the possibility of gas nuclei development and the subsequent early cavitation at the water–diaphragm interface. The procedures employed for the design, fabrication, saturation and calibration of the new tensiometers are explained in detail. Furthermore, the performance of the developed HCTs is examined based on a series of experiments carried out on a number of unsaturated clay specimens. An improvement in maximum sustainable suction in the range of 120–150% of their nominal capacity was obtained from different surface treatment methods. Moreover, the results show an improvement of up to 177% for the long-term stability of measurements, compared to the developed ordinary HCTs with untreated diaphragms.

AB - High-capacity tensiometers (HCTs) are sensors made to measure negative pore water pressure (suction) directly. In this paper, a new approach is proposed to expand the range and duration of suction measurements for a newly designed HCT. A new technique is employed to reduce significantly the roughness of the diaphragm’s surface on the water reservoir side in order to minimise the possibility of gas nuclei development and the subsequent early cavitation at the water–diaphragm interface. The procedures employed for the design, fabrication, saturation and calibration of the new tensiometers are explained in detail. Furthermore, the performance of the developed HCTs is examined based on a series of experiments carried out on a number of unsaturated clay specimens. An improvement in maximum sustainable suction in the range of 120–150% of their nominal capacity was obtained from different surface treatment methods. Moreover, the results show an improvement of up to 177% for the long-term stability of measurements, compared to the developed ordinary HCTs with untreated diaphragms.

KW - Field testing & monitoring

KW - Geotechnical engineering

KW - Strength and testing of materials

UR - https://www.scopus.com/pages/publications/85048741005

U2 - 10.1680/jgere.17.00016

DO - 10.1680/jgere.17.00016

M3 - Article

SN - 2052-6156

VL - 5

SP - 81

EP - 95

JO - Geotechnical Research

JF - Geotechnical Research

IS - 2

ER -

Cavitation in high-capacity tensiometers: effect of water reservoir surface roughness

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this