ID 423

Spreading Dynamics of Nanofluid Droplets Impact on Solid Surface

 

Abstract:

The nanofluid is a class of fluids with high thermal conductivity and non-Newtonian flow behaviors. In this work, we conducted experimental and numerical studies on the transient spreading behaviors of nanofluid droplets containing multiwall carbon nanotube (MWCNT) and nano-graphene additives on a solid surface. The high-speed camera visualization was used to capture the spreading phenomenon experimentally. To capture the interface movement, the finite-element based scheme coupled with level set method has been employed. The shear thinning properties of those nanofluids were measured with rotational rheometer and analyzed by employing Carreau-Yasuda model. The dynamic contact angle (DCA) and transient relative height along with the spreading time of droplets under different Weber numbers (We) were investigated through post-image processing.