دراسة مقارنة لأثر العوامل الهيدروديناميكية على فقدان الضغط في أنابيب النفط الثقيل- تحليل الجريان الرقائقي في الأنابيب الأفقية والمائلة بزاوية "30 درجة"

Abstract

This study presents a comprehensive comparative analysis of heavy oil pipeline performance under laminar flow conditions, focusing on the fundamental differences between horizontal pipelines and inclined pipelines at a 30-degree upward angle. The research employed a mathematical model based on the Hagen-Poiseuille equation with gravity effect modifications, and simulations were conducted using MATLAB 2014. Results demonstrated that the inclination angle represents the most influential factor on pressure loss, with inclined pipelines recording a pressure loss 12 times higher than horizontal pipelines, necessitating different design considerations for each case.

The inclination angle is the most dominant factor affecting total pressure loss in inclined pipelines, with gravity contribution accounting for 99.2% of the total pressure loss. Laminar flow remains dominant in both pipeline types at low to medium velocities (Re < 2300). In both pipeline types, diameter has a tremendous impact on pressure loss (Δp ∝ 1/D⁴), and increasing diameter significantly reduces pressure loss.