Analysis of factors influencing thermal conductivity and viscosity in different kinds of surfactant solutions

Multiscale Modeling of Multiphase Fluid Flow

“…Compared to the reported values in Ref. [61], both water models lead to higher than experimental thermal conductivity of the aqueous SDS solutions. As in the case of pure water, the flexible water potential leads to an overestimate of the thermal conductivity of the solution.…”

“…The values of the thermal conductivity of aqueous SDS solutions, computed with flexible and rigid TIP3P water model at room and boiling temperature and different surfactant concentrations are listed in Table 3-2. Recently, an experimental investigation of the effects of the surfactant concentration, temperature, and pH on the thermal conductivity of aqueous solutions of non-ionic, cationic, and anionic surfactants, was reported [61]. Compared to the reported values in Ref.…”

“…There have been a number of microscopic models attempting to describe nucleate boiling with additives [62][63][64] but there is still a need for better understanding on a molecular level. Recently, the effect of concentration, chemistry, temperature, and pH on thermal conductivity and viscosity of bulk aqueous surfactant solutions were studied experimentally by Zhou et al [61]. It was observed that while the addition of any surfactant decreases the thermal conductivity of the solution, non-ionic surfactants reduce the thermal conductivity more than the ionic ones.…”

“…On a macroscopic level, solution additives contribute to dynamic surface tension [36,40,52,57] and modify the surface wettability [58]. Since nucleate boiling is such ubiquitous thermal management method, there is a sustained interest in its enhancing, better understanding, and control [39,42,46,47,51,[59][60][61]. There have been a number of microscopic models attempting to describe nucleate boiling with additives [62][63][64] but there is still a need for better understanding on a molecular level.…”

Synthesis of colloidal nanomaterials through femtosecond laser ablation

“…A larger thermal conductivity enhancement can be obtained with more concentrated suspensions [202]. However, as the NP concentration increases, nanofluids could show stability problems, that in case of chemically-stabilized samples it means the need of a larger surfactant amounts with a detrimental effect on thermal conductivity properties [203]. In this framework, physical techniques like PLAL-PPLI, which are able to produce stable nanofluids without the use of surfactants, can have an even larger impact on solar nanofluids fabrication.…”