Study of Temperature Effect on Cascade Characteristics of Nanofluidic Energy Absorption System

Author:

Zhang Yafei12ORCID,Wang Haitao12,Xiao Hongjiu12,Liu Shenlei12,Wei Wenlan12ORCID,Dou Yihua12

Affiliation:

1. College of Mechanical Engineering, Xi’an Shiyou University, Xi’an 710065, China

2. Xi’an Key Laboratory of Integrity Evaluation of Highly Difficult and Complex Oil and Gas Wells, Xi’an 710065, China

Abstract

Nanofluidic energy absorption system (NEAS) with cascade energy absorption characteristics can absorb energy on different levels simultaneously in one system, which greatly enriches its functions and applications. The pore structure and size distribution of porous media play a crucial role in the design and construction of cascade nanofluidic systems. In this paper, two cascade pore models were constructed using carbon nanotubes with different diameters, one was the model of two tubes with both one end immersed in water (DNEAS), and the other was the model of two tubes end to end, with the end of the big tube immersed in water (SNEAS). The effects of temperature-coupled pore size on the infiltration processes of water molecules into two models were investigated. The fitting correlations between critical pore size difference and temperature were established. The microscopic mechanism of temperature effect was illuminated. With the increase in temperature, systems displaying cascade characteristics transformed into a single-stage system without cascade characteristics. Due to the significant size effect of system temperature, the critical pore difference increased with both system temperature and the pore size. The research results expanded the basic database of cascade nanofluidic systems and provided guidance for the application design of cascade nanofluidic systems.

Funder

National Natural Science Foundation of China

Innovative Talent Promotion Program “Young Science and Technology Star Project” of Shaanxi Province in China

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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