What is a cerebral aneurysm? A cerebral aneurysm is a bulge in a weak area of the wall of a brain artery. It puffs out like a small balloon and fills with blood. It is also called an intracranial aneurysm or brain aneurysm. This bulge makes the artery more likely to tear (rupture) in that spot. A cerebral aneurysm occurs more often in arteries at the base of the brain. But it may occur in Read more…
Mesh Generation Mesh or grid is defined as a discrete cell or elements into which the domain/ model is divided. All the flow variables & any other variables are solved at centres of these discrete cells. This entire process of breaking up a physical domain into smaller sub-domains (elements/ cells) is called as mesh generation. Structured vs. Unstructured Mesh ResearchGate Question A general Finite-volume-based code does not make differences between structured and unstructured grids. It Read more…
Cadence Cadence is a pivotal leader in electronic design, building upon more than 30 years of computational software expertise. The company applies its underlying Intelligent System Design strategy to deliver software, hardware and IP that turn design concepts into reality. Cadence customers are the world’s most innovative companies, delivering extraordinary electronic products from chips to boards to systems for the most dynamic market applications including consumer, hyperscale computing, 5G communications, automotive, aerospace, industrial and health. Read more…
What is Cavitation? Cavitation happens when vapor bubbles form in a liquid because flow dynamics cause the local static pressure to drop below the vapor pressure. Without accurate prediction of cavitation, users cannot effectively optimize designs and set operating parameters and limits, potentially exposing their products to unexpected vibration and damage. The phenomenon known as cavitation is the formation of vapor bubbles within a liquid when flow dynamics cause the local static pressure to drop Read more…
3D Blood Flow Simulation Bio-medical researchers have been relying on computational fluid dynamics to model and understand the physical mechanisms behind the formation and progression of hemodynamic disorders. Wall shear stress (WSS) exerted on the walls of the blood vessel due to the flow of blood is one of the main pathogenic factors leading to the development of such disorders. The magnitude and distribution of the WSS in a blood vessel can provide an insight Read more…
Pressure The pressure could be measured by different devices such as barometer, piezometer and Pitot tube. A barometer is a scientific instrument that is used to measure air pressure (atmospheric pressure) in a certain environment. Pressure tendency can forecast short term changes in the weather. The atmospheric pressure (ambient pressure) causes the fluid inside the tube to rise. So the barometer pressure is the atmospheric pressure which is known as Operative pressure in the Fluent software. It is Read more…
The COMSOL Multiphysics software suite is used worldwide as an indispensable tool for a variety of computer simulations for R&D as well as for learning. It is a general-purpose simulation software package for modeling designs, devices, and processes in all fields of engineering, manufacturing, and scientific research. In addition to using multiphysics modeling for one’s own projects, one can also turn the resulting models into simulation applications for use by other design teams, for manufacturing, Read more…
During floods, the density of river water usually increases due to a subsequent increase in the concentration of the suspended sediment that the river carries, causing the river to plunge underneath the free surface of a receiving water basin and form a turbidity current that continues to flow along the bottom.
The study and understanding of such complex phenomena is of great importance, as they constitute one of the major mechanisms for suspended sediment transport from rivers into oceans, lakes or reservoirs. Unlike most of the previous numerical investigations on turbidity currents, in this project, a 3D numerical model that simulates the dynamics and flow structure of turbidity currents, through a multiphase flow approach is proposed, using the commercial CFD code FLUENT.
A series of numerical simulations that reproduce particular published laboratory flows are presented. The detailed qualitative and quantitative comparison of numerical with laboratory results indicates that apart from the global flow structure, the proposed numerical approach efficiently predicts various important aspects of turbidity current flows, such as the effect of suspended sediment mixture composition in the temporal and spatial evolution of the simulated currents, the interaction of turbidity currents with loose sediment bottom layers and the formation of internal hydraulic jumps.
Furthermore, various extreme cases among the numerical runs considered are further analyzed, in order to identify the importance of various controlling flow parameters.
3D Laboratory Setup
Geometry, mesh and boundary conditions used in the numerical simulations
X Velocity Contours of Turbid Currents
This numerical project was conducted by XAV experts.
Make Region and use Separate tool inside Ansys Fluent In this video, I am going to show how you can use a useful tool in Ansys Fluent. As you know, it is difficult to separate a boundary condition inside Ansys Fluent into multi-walls. For example, you have a wall boundary condition that has been imported from your meshing software. For divided this boundary condition into three different walls and set different conditions to them separately, Read more…
Flat Plate Solar Collectors A Flat Plate Collector is a heat exchanger that converts the radiant solar energy from the sun into heat energy using the well known greenhouse effect. It collects, or captures, solar energy and uses that energy to heat water in the home for bathing, washing and heating, and can even be used to heat outdoor swimming pools and hot tubs. In this project, a numerical study was conducted to investigate the Read more…
