Author/Authors :
Mukesh Kumar, P. C Department of Mechanical Engineering - University College of Engineering, Dindigul, India , Muruganandam, M Department of mechanical engineering - St. Joseph’s College of Engineering and Technology, Thanjavur
Abstract :
The technological development for industries faces the challenges in meeting out the cooling demand due
to the existing coolants have reached their limitations. The nanofluids are the dispersion of the nanomaterials
into base fluids have been developed to solve the problems associated with the existing coolants in the
thermal systems. The stability of nanofluids is a crucial issue for both scientific research and practical
applications to provide better cooling. In this investigation, seven Multi walled Carbon Nano Tube MWCNT
nanofluids have been prepared by using two step method with Distilled water, Coolant oil, Engine oil, Gear
oil, Vegetable oil, Coconut oil, and Grown oil as base fluids at the volume concentration of 0.1% and
without adding any stabilizing agent. The UV-Vis spectrophotometers, measure of pH values, and
photograph capturing techniques have been used for stability analysis in this investigation by keeping the
nanofluids under static condition period of 30 days. It is found from the three stability analysis techniques
that the stability of nanofluids are in the increasing order of MWCNT / Distilled water nanofluid, MWCNT
/ Coolant oil nanofluid, MWCNT / Coconut oil nanofluid, MWCNT / Vegetable oil nanofluid, MWCNT /
Engine oil nanofluid, MWCNT /Gear oil nanofluid and MWCNT/Grown oil nanofluid. The MWCNT /
Distilled water nanofluid has poor stability and MWCNT/Grown oil nanofluid has good stability.
Keywords :
Sonication , MWCNT , Stability , Base fluids , Nanofluids
