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http://nopr.niscpr.res.in/handle/123456789/7006| Title: | Rheology of multigrade engine oils |
| Authors: | Tanveer, Sabiha Sharma, Umesh Chandra Prasad, Ram |
| Keywords: | Rheology;Multigrade engine oil;Viscosity;Shear rate |
| Issue Date: | Mar-2006 |
| Publisher: | CSIR |
| IPC Code: | C10M107/00 |
| Abstract: | Rheology of multigrade engine oils, SAE 15W-40, SAE 20W-40, SAE 20W-50 and SAE 25W-50 has been examined experimentally in the temperature range of -20 to 20°C. Experiments have been carried out to observe the dependence of shear rate, time and temperature on the apparent viscosity of these multigrade engine oils. The oils SAE 15W-40 and SAE 20W-40 are found to behave as Newtonian fluids above a temperature of about 5°C. The oils SAE 20W-50 and SAE 25W-50 are found to behave as Newtonian fluids above a temperature of about 10°C. Below these temperatures, they behave as dilatant fluids. These oils also exhibit a rheopectic behaviour. The apparent viscosity of these multigrade engine oils decreases with increase in temperature. |
| Page(s): | 180-184 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Appears in Collections: | IJCT Vol.13(2) [March 2006] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCT 13(2) 180-184.pdf | 236.08 kB | Adobe PDF | View/Open |
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