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Erosive wear is one of the efficiency reduction causes in centrifugal compressors. The presence of suspended solid particles in the fluid causes deformations in different parts of the compressor, especially blades of the impeller. Therefore, erosion not only decreases the part lifetime by destruction of blades form, but also increases energy losses. For this reason, specifying the erosion locations...
Following a thorough time-resolved 2-D particle image velocimetry experimental investigation of the wake of a square wall-mounted finite cylinder, at Reynolds Re = 5.4 × 104 with aspect ratio H/d = 3, a 3-D DNS numerical investigation was performed under similar flow conditions and comparable Reynolds number (Re = 4.0 × 104). In this paper, the simulation results in four 2-D planes are compared to...
Heat transfer in a hydrodynamic journal bearing is investigated. Three-dimensional, two-phase, transient, and laminar flow of oil and air inside the bearing is simulated. In order to determine the thermal boundary condition of the outer walls of the bearing, the turbulence airflow around the bearing is simulated. The geometric model of the bearing and its surrounding is produced. Due to the complexity...
This paper presents for the first time a numerical prediction of the thrombogenic potential by means of partial differential equation in computational fluid dynamics for cardiovascular devices. To quantify the thrombogenic potential was developed the Platelet Lysis Index equation in an Eulerian model. Six different catheter tip models with the results obtained from the literature, however, with Lagrangian...
The use of cookstoves is as old as human civilization, and food cooking is considered to be one of the major steps responsible for human brain development. Around 60% of the world population still relies on the use of biomass cookstoves for cooking and heating needs. The present work is an attempt to find a better and easy solution for designing a cookstove. A mathematical approach is presented in...
Acoustics loads are rocket design constraints which push researches and engineers to invest efforts in the aeroacoustics phenomena which is present on launch vehicles. Therefore, an in-house computational fluid dynamics tool is developed in order to reproduce high-fidelity results of supersonic jet flows for aeroacoustic analogy applications. The solver is written using the large eddy simulation formulation...
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