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Movement of Entrapped Air-Pockets in the Bottom Outlet of Dams and Solutions to Related Problems
, M.Sc. Thesis Sharif University of Technology ; Shamsaei, Abolfazl (Supervisor) ; Ghaemian, Mohsen (Supervisor)
Abstract
The purpose of this study is to investigate the entrapment and movement of air pockets in the bottom outlet of dams and numerical simulation of the process of entrapment and entrainment of air pockets. One of the most common problems with bottom outlets is the air-water mixture flow. The main purpose of this study is to investigate the causes of air pockets in pressurized tunnels before service and emergency gates in the bottom outlets and to provide effective solutions to prevent the occurrence of unwanted air entrapment and many problems resulting from it. To do this, using FLOW-3D flow simulator, the way of entraping air pockets in the Bottom outlet of Darian Dam has been investigated and...
Effect of working fluid inventory and heat input on transient and steady state behavior of a thermosyphon
, Article Journal of Thermal Analysis and Calorimetry ; 2020 ; Forootan, D ; Farajimoghaddam, F ; Sharif University of Technology
Springer Netherlands
2020
Abstract
The effect of working fluid inventory and heat input on the performance of thermosyphon is investigated in this paper. First, a thermosyphon with diameter of 16 mm made of steel with toluene as working fluid and the length of the evaporator, adiabatic and condenser section 10, 23 and 17 cm was considered, respectively. The working fluid inventory was considered 0.1, 0.14, 0.18 and 0.24 of total volume of thermosyphon and in each case 54–235 W of heat input applied to the evaporator area also. In order to evaluate the transient behavior of the thermosyphon, in any amount of working fluid, 28 W of heat input was considered and temperature of the evaporator area were recorded at different...
Effect of working fluid inventory and heat input on transient and steady state behavior of a thermosyphon
, Article Journal of Thermal Analysis and Calorimetry ; Volume 143, Issue 5 , 2021 , Pages 3825-3834 ; 13886150 (ISSN) ; Forootan, D ; Farajimoghaddam, F ; Sharif University of Technology
Springer Science and Business Media B.V
2021
Abstract
The effect of working fluid inventory and heat input on the performance of thermosyphon is investigated in this paper. First, a thermosyphon with diameter of 16 mm made of steel with toluene as working fluid and the length of the evaporator, adiabatic and condenser section 10, 23 and 17 cm was considered, respectively. The working fluid inventory was considered 0.1, 0.14, 0.18 and 0.24 of total volume of thermosyphon and in each case 54–235 W of heat input applied to the evaporator area also. In order to evaluate the transient behavior of the thermosyphon, in any amount of working fluid, 28 W of heat input was considered and temperature of the evaporator area were recorded at different...