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Volume 4, Issue 1 (spring 2023)
Abstract

Issue & Purpose: Despite the passage of about fifty years since the establishment of the urban design course at the University of Tehran and after that teaching at other universities in Iran, it still seems that the potential capacities of this course and graduates have not been used well in the profession. The purpose of this research is to identify and explain the duties, roles and potential capacities of Iranian urban designers in their profession and seeks to answer the question of what their potential duties are in their profession.
Method: The current research was formed with a qualitative approach and in order to answer the above question, it used the methods of content analysis as well as qualitative survey. The techniques used in data collection include reviewing library documents and related articles, open interviews with professors, experts and experienced professionals, as well as a structured online questionnaire, and in line with the analysis The Interpretive analysis technique was used for the data.                                                                                           
Findings: The achievement of this research is to introduce and evaluate the importance of 8 activity capacities of Iranian urban designers in their profession, which are respectively: urban management, consulting engineer's offices, NGO, education, interdisciplinary activities, supervisor (supervision of design and implementation), contractor and research. According to the findings of the research, among these eight capacities in the field of urban management, offices of consulting engineers, non-governmental organizations, and education are respectively more important from the point of view of urban design experts.

Keramatollah Ziari, Saeed givehchi, Mohsen Adeli,
Volume 21, Issue 3 (Fall 2017)
Abstract



Volume 24, Issue 2 (6-2024)
Abstract

The Water Column Separation phenomenon is one of the transient flow regimes, which is created under conditions such as the sudden closing of the valve or the shutdown of the pump in the water supply network. Hard pressure fluctuations and damages caused by the mentioned phenomenon require identifying and providing a solution to prevent it. By this purpose, the present article investigates the possibility of Water Column Separation in a Loop Water Supply Network using Computational Fluid Dynamics method. Next, the Effect of the inlet velocity on the pressures created due to the Water Column Separation was investigated. For software validation, the Loop system provided by Wang et al. (2017) was selected. After ensuring the efficiency of the software to model the phenomenon of Water Column Separation, simulation was performed at different speeds. Checking the simulation results indicated the occurrence of Water Column Separation in the Intended Network. Also, the Results indicated that with the increase of the input Velocity, the maximum value of the Pressure in the Network increases and its minimum value decreases. In such a way that with a 12% increase in the input velocity, the maximum pressure value changes by 11.8% and the minimum value by 14.26%. In general, it can be said that by controlling the Velocity as an effective factor on the pressure fluctuations of the Water Column Separation, this phenomenon and the resulting damages are prevented.
 

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