|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.13 [2006] >
IJCT Vol.13(2) [March 2006] >
| 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) |
| Source: | IJCT Vol.13(2) [March 2006]
|
|
