On the Intricate Relation between Contact Aspect Ratio, High-Pressure Rheology, and Minimum Film Thickness in Elastohydrodynamic Conjunctions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0201449" target="_blank" >RIV/00216305:26210/26:0201449 - isvavai.cz</a>
Result on the web
<a href="https://rdcu.be/e4st3" target="_blank" >https://rdcu.be/e4st3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11249-025-02009-9" target="_blank" >10.1007/s11249-025-02009-9</a>
Alternative languages
Result language
angličtina
Original language name
On the Intricate Relation between Contact Aspect Ratio, High-Pressure Rheology, and Minimum Film Thickness in Elastohydrodynamic Conjunctions
Original language description
Until recently, it was believed that both central and minimum film thickness in elastohydrodynamic lubricated conjunctions are governed by the lubricant low-pressure rheology, in the contact inlet. A recent study by the authors has shown that minimum film thickness in circular contacts is also affected by the high-pressure rheology. It was shown that higher lubricant viscosity in the high-pressure central zone of the contact leads to lower minimum film thicknesses. This was linked to a reduction in lubricant outflow from the contact through the sides. That is why such effects would not be observed in infinitely long line contacts. It was then posited that minimum-film-thickness sensitivity to high-pressure rheology should be higher in circular contacts than wide elliptical ones and even higher in slender contacts. The current work aims to verify this assumption and elucidate the intricate relation between contact aspect ratio, high-pressure rheology, and minimum film thickness in elastohydrodynamic conjunctions. This is done through finite element simulations of elliptical contacts of variable ellipticity, lubricated with two hypothetical fluids having the exact same low-pressure viscosity response, but a different high-pressure one.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20301 - Mechanical engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
TRIBOLOGY LETTERS
ISSN
1023-8883
e-ISSN
1573-2711
Volume of the periodical
73
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
1-10
UT code for WoS article
001485426400001
EID of the result in the Scopus database
2-s2.0-105004642786