Sensitivity Analysis of Entropy Generation in Nanofluid Flow inside a Channel by Response Surface Methodology

Abstract

Nanofluids can afford excellent thermal performance and have a major role in energy conservation aspect. In this paper, a sensitivity analysis has been performed by using response surface methodology to calculate the effects of nanoparticles on the entropy generation. For this purpose, the laminar forced convection of Al 2 O 3 -water nanofluid flow inside a channel is considered. The total entropy generation rates consist of the entropy generation rates due to heat transfer and friction loss are calculated by using velocity and temperature gradients. The continuity, momentum and energy equations have been solved numerically using a finite volume method. The sensitivity of the entropy generation rate to different parameters such as the solid volume fraction, the particle diameter, and the Reynolds number is studied in detail. Series of simulations were performed for a range of solid volume fraction 0 ď φ ď 0.05, particle diameter 30 nm ď dp ď 90 nm, and the Reynolds number 200 ď Re ď 800. The results showed that the total entropy generation is more sensitive to the Reynolds number rather than the nanoparticles diameter or solid volume fraction. Also, the magnitude of total entropy generation, which increases with increase in the Reynolds number, is much higher for the pure fluid rather than the nanofluid.

Effects of Radiative Electro-Magnetohydrodynamics Diminishing Internal Energy of Pressure-Driven Flow of Titanium Dioxide-Water Nanofluid due to Entropy Generation

“…They perceived that entropy generation near the channel wall rapidly increased with the increase of the joule heating parameter. A few remarkable contributions on entropy generation with diverse studies can be explored in References [22][23][24][25][26][27][28].The existing literature firmly endorses that the effective influences of electro-magnetohydrodynamics (EMHD) and entropy generation with nanoparticles through a wavy channel on Poiseuille flow synthesis, are yet not to be addressed. In addition, what made this investigation more fruitful was to observe the simultaneous application of electro-hydrodynamics (EHD) and thermal radiation.…”

“…They perceived that entropy generation near the channel wall rapidly increased with the increase of the joule heating parameter. A few remarkable contributions on entropy generation with diverse studies can be explored in References [22][23][24][25][26][27][28].…”

Entropy Generation in C6H9NAO7 Fluid Over an Accelerated Heated Plate

“…Darbari et al used the response surface method (RSM) to conduct a numerical sensitivity analysis of the effect of nanoparticles (Al 2 O 3 ) in water-based nanofluids on EG [9]. The results indicated that the total EG comprised EG due to friction and due to heat conduction.…”

Spatial entropy generation analysis for the design improvement of a single slope solar still

“…They found that the frictional entropy generation enhances as the Darcy number decreases. Darbari et al performed entropy generation analysis for nanofluid flow through a channel. They concluded that the total entropy generation reduces with an increase in the nanoparticles diameter.…”