Correction of Terminal Velocity Prediction Model for CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;-Kerosene and Air-Kerosene Systems by Artificial Intelligence

Sadra Mahmoudi,Bahram Hashemi Shahraki,Masoud Aghajani

doi:10.11648/j.se.20170505.11

Abstract

In this study the essential factors of rising air and CO2 bubbles in distillated water and kerosene investigate with the experimental and theoretical attitude. Many formulas developed by pervious investigators for bubble terminal velocity prediction in air-water system. By using PSO (particle swarm optimization) algorithm and plotting experimental data of terminal velocity against the size of gas bubbles, suitable was chosen. Results showed that Jamialahmadi model is more practical for air-water and CO2-water system. The main aim of this paper is to validate and correct Jamialahmadi model for predicting of bubble’s terminal velocities in air-kerosene and CO2-kerosene systems. Jamialahmadi model requires a modification to be utilized for air-kerosene and CO2-kerosene system. The developed PSO algorithm model is accurate for prediction of experimental data with an average R2 value of 0.976.

Highlights

In chemical industries, contacting of liquid and gas phases is very essential and usual [1]
Air-Water System In Figure 2, experimental data for air and distillated water are plotted against the bubble diameter
Due to limitations of bubble column size and orifice diameter, bubble sizes were limited to 1m-16mm range and thereby, this restriction exists in all experiments

Summary

Introduction

In chemical industries, contacting of liquid and gas phases is very essential and usual [1]. Ascending velocity of the bubbles controls the operation time. It is essential for reinforcing the overall performance of the equipment [3]. Rising velocity of the bubbles can be gained by considering the driving force for climbing and the opposing forces [4]. The form and terminal rising velocity of single bubbles change as the bubble size varies, based on the following regimes [4]: 1) Viscosity dominant region 2) Intermediate region in which surface tension, viscous and inertial effect on this regime must be considered. Among these three areas, the middle area is the most important regime calls for more attention because different forces affect the velocity of the bubble, while the effect of each one is still not well understood [4, 5]. The best model would be chosen by comparison of experimental data and mathematical models

Objectives

Methods

Results

Conclusion