Preparation method of copper oxide drag-reduction nano fluid

Abstract

The invention relates to a preparation method of a cupric oxide anti-drag nanometer fluid, which takes deionized water as a base fluid, and adds a surfactant Cetyltrimethyl Ammonium Chloride (CTAC) and nano-scale cupric oxide solid particles. The method comprises: adding the CTAC in fixed proportion into the deionized water, then adding a certain amount of cupric oxide nano-particles, and then placing the obtained mixed solution into an ultrasonic oscillator for oscillations for 10 to 14 hours, and finally preparing the cupric oxide anti-drag nanometer fluid. The applicable pipe diameter scope of the method is from 1 to 40cm, and the range of Reynolds number is between 4000 and 100000. The effective concentration scope of the CTAC is selected according to different operating conditions (pipe diameter and Reynolds number). The mixture ratio of the additive directly influences the flow and heat transfer performance of the cupric oxide anti-drag nanometer fluid. The cupric oxide anti-drag nanometer fluid has the feature of reducing the flow resistance of the anti-drag fluid in the transport process, and also has the characteristic of heat exchange enhancement of the nano-fluid.

Description

Preparation method of copper oxide drag-reducing nanofluid technical field The invention relates to a method for preparing a copper oxide drag-reducing nanofluid, belonging to the technical fields of liquid transportation and heat exchange. Background technique The urgent need for energy saving is the driving force for drag-reduction research. For a long time, in all fields involving viscous fluid motion, from internal flow to external flow, people have been looking for ways to reduce fluid resistance. The viscous drag reduction method is a technology that relies on changing the physical and mechanical properties of the boundary material or adding drag reducing additives to the flow boundary layer to change the kinematics and dynamics of the boundary layer flow, thereby achieving the purpose of drag reduction. Adding a small amount of additives (such as sand, fibers, polymers, surfactants, etc.) to the fluid can reduce the fluid flow resistance in a turbulent state. This ...

AI Technical Summary

Problems solved by technology

However, the surfactant drag-reducing fluid greatly reduces the heat exchange capacity of the fluid while reducing the fluid transport resistance, which is one of the biggest disadvantages of the surfactant drag-reducing fluid

Nanofluids can improve the heat transfer capacity of the fluid to a certain extent, but also slightly increase the flow resistance of the fluid.

Images