PROJECT RISKS DURING THE COVID-19 PANDEMIC AND THEIR EFFECTS ON DELAYS AND COST OVERRUNS
The COVID-19 pandemic has significantly impacted project implementation costs and caused delays across numerous industries. Various analysis found in the literature show that the predominant cause of project delays and higher costs have been people, material, and equipment movement restrictions, supply chain disruptions, and social distancing polic...
By Ilija Stojanović, Marko Selaković, Marija Gačić, Milica Kaplarević, Nenad Filipović
LOAD-CARRYING CAPACITY OF PIVOTED CURVED SLIDER BEARINGS SUBJECT TO SURFACE ROUGHNESS PATTERN AND NON-NEWTONIAN FLUID FLOW BEHAVIOR
The present paper analyzes the Rabinowitsch fluid (RF) behavior on a pivoted curved slider with surface roughness (SR) with the aid of the perturbation technique. In order to account for the random roughness of the bearing surfaces, a stochastic random variable with a nonzero mean, variance, and skewness was taken into consideration. The averaged R...
By Amit Kumar Rahul, Manoj Kumar Singh, Om Namah Sivaya, Saurabh Chandra Maury, Ravi Tiwari, Rohahn Biswas
SIMULATION OF FLUID-STRUCTURE INTERACTION IN AN ARTERY ALTERED BY SEGMENTAL MEDIOLYSIS
Segmental arterial mediolysis (SAM) is an asymptomatic, non-atherosclerotic and non-inflammatory disease of unknown etiology. It affects medium-sized arteries and is characterized by vacuolization and lysis at the level of the media which can lead to dissection, steno-occlusion, or an aneurysm. In this article, a simulation of fluid-structure inter...
By Mouloud Mohellebi, Mohamed Ferrouk, Hocine Tebbiche
EFFECTS OF GAS RADIATION AND ACCELERATED FLOW ON SOLAR HEATER PERFORMANCE
In this paper, the performance enhancement of solar gas heaters is evaluated by taking the advantage of both radiating gas effect and using converged ducts with the accelerated flow. The analyzed solar gas heater includes the glass cover, air gap, absorber, gas channel, bottom plate, and insulation. The inclined position of the bottom plate relativ...
By Seyed Abdolreza Gandjalikha Nassab
FIGURE OF MERIT STUDY FOR VALVELESS PIEZOELECTRIC MICROPUMP DESIGNED TO HANDLE LIQUID AND GAS FLUID IN MEDICAL AND ENVIRONMENTAL APPLICATIONS
Micropumps are revolutionizing compact and autonomous monitoring systems due to their portability and efficiency. In this paper, we present a valveless piezoelectric micropump design. This micropump distributes gas and liquid using a PDMS membrane that moves in response to a force applied by a piezoelectric actuator. The proposed design aims to ach...
By Asma Bouzid, Mohamed El Amine Brixi Negassa, Parastesh Pirastesh, Joel Charrier, Sofiane Soulimane
NUMERICAL ANALYSIS OF AN INNOVATIVE ENERGY DISSIPATION DEVICE
Application of systems for passive vibration control is an efficient way for seismic protection of structures. Systems for passive vibration control consist of seismic isolation devices and energy dissipation devices. Base isolation of structures is a concept where devices for passive vibration control are placed in foundations of buildings. Variou...
By Andrija Zorić, Dragan Zlatkov, Marina Trajković-Milenković, Marina Mijalković, Biljana Mladenović
RISK CLASSIFICATION FOR SUDDEN CARDIAC DEATH IN PATIENTS WITH HYPERTROPHIC CARDIOMYOPATHY BASED ON MACHINE LEARNING ALGORITHMS
Hypertrophic cardiomyopathy is one of the most prominent cardiovascular diseases, with almost 1 in 500 people suffering from it. It is of great importance for this disease to be detected in a timely manner, so that patients can be provided with an adequate therapy. This is also important for monitoring the future development of the disease so that ...
By Ognjen Pavić, Lazar Dašić, Tijana Geroski, Mina Vasković Jovanović, Nenad Filipović
BEHAVIOR OF NON-NEWTONIAN FLUID IN A LID-DRIVEN CHAMBER WITH HEATED BODIES SUBJECTED TO A UNIFORM MAGNETIC FIELD
Recent studies have attempted to find methods and techniques that enable the development of heat transfer within thermal transformers. For this purpose, this paper includes a numerical simulation of a non-Newtonian fluid inside a chamber with four hot bodies. The chamber is exposed to a magnetic field of constant and uniform intensity. Also, the up...
By Yamina Anouar
LINEAR AND NON-LINEAR ANALYSES OF PRESSURE PIPE ELBOWS
The introduction of pressure piping increasingly requires the use of efficient materials which must withstand both high hydrostatic pressures, high mechanical loads and high thermal gradients. At nuclear power plants, piping systems are subjected to high pressures (up to 60 MPa). The occurrence of cracks and their possible spread is one of the seri...
By Benouis Ali, Zahi Rachid, Moulgada Abdelmadjid, Djebbar Noureddine
NUMERICAL SOLUTION OF NON-SIMILAR BOUNDARY-LAYER FLOW OVER A CYLINDER
This paper presents а numerical solution of a non-similar two-dimensional boundary-layer flow over a cylinder. The assumptions and related two-dimensional flow equations are presented. The fourth-order Runge-Kutta method with the backward differentiation formula (BDF) method to separation point is implemented in the numerical solution usin...
By Vahid Rezaee, Arash Houshmand