Abstract
A Washburn-based model for oil release from a patch of lubricating grease:
Lubricating grease, the most common lubricant for rolling bearings, consists of a thickener matrix and mobile base oil. This base oil is slowly released from the grease and provides the bearing with a thin film that separates the contacting surfaces, giving the bearing a long operational life. This so-called “grease bleeding” process is studied in a model configuration consisting of a defined volume of grease on a sheet of absorbing paper. The volumetric flux is determined by the transmission intensity of the paper. A continuum model has been developed using a Lucas-Washburn like approach, where both the grease and the paper are described as porous materials each with their own properties. The creeping oil flow is caused by the difference in wettability of the grease matrix and the paper.
Lubricating grease, the most common lubricant for rolling bearings, consists of a thickener matrix and mobile base oil. This base oil is slowly released from the grease and provides the bearing with a thin film that separates the contacting surfaces, giving the bearing a long operational life. This so-called “grease bleeding” process is studied in a model configuration consisting of a defined volume of grease on a sheet of absorbing paper. The volumetric flux is determined by the transmission intensity of the paper. A continuum model has been developed using a Lucas-Washburn like approach, where both the grease and the paper are described as porous materials each with their own properties. The creeping oil flow is caused by the difference in wettability of the grease matrix and the paper.
| Original language | English |
|---|---|
| Publication status | Published - 22 Jan 2019 |
| Event | Physics@Veldhoven 2019 - De Koningshof, Veldhoven, Netherlands Duration: 22 Jan 2019 → 23 Jan 2019 https://www.nwo.nl/en/news-and-events/events/physicsveldhoven |
Conference
| Conference | Physics@Veldhoven 2019 |
|---|---|
| Country/Territory | Netherlands |
| City | Veldhoven |
| Period | 22/01/19 → 23/01/19 |
| Internet address |