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Temperature coupled mold filling-solidification simulation
Centrifugal casting of automotive turbocharger wheels
Temperature-coupeld mold-filling simulation based on accelerated rotation
A Volume Rendering of the fluid flow of a rotating Pelton water turbine.
Simulating Flow & Heat in Gas Turbine Engines - Part 1
Whether gas turbine (GT) engines are used for aircraft propulsion or for ground-based power generation, they involve sophisticated subsystems that ‘turn’ (compressors and turbines) and ‘burn’ (combustors). The goal with GT engines is to provide the rated power with maximum fuel efficiency and uptime reliability, while not exceeding government-regulated levels of emissions. While separately each GT subsystem must be designed for maximum performance, together they must also be designed to work harmoniously to ensure the entire GT engine system functions as intended. Trying to find an optimal...
I was recently traveling to a User Conference that CD-adapco held in Asia and spent a great deal of time staring out the window of various aircraft. With several hours to contemplate wings, I started thinking about boundary layers and how I have been simulating them. After reading “Boundary Layer Theory” by H. Schlichting, I had to double-check to make sure my designs were modeling the fluid phenomena near the wall correctly. What we design is far from well-known and validated fluid dynamics test cases. In fact, we invent some of the most unconventional products. As I opened the simulations...
Time-Accurate Simulation of Crown-Implant Cementation
STAR-CCM+ was used to perform numerical simulations on the complete implant abutment, cement and crown system. The objective of the simulations was to better understand the cement flow patterns during the seating of the crown, and to explore the effects of modifying the abutments and altering cement application techniques.
For this optimization, Optimate+ was used to identify Pareto optimimum designs. The objective functions were to maximize mass flow through the medical inlet and to minimize pressure drop. Best solution was obtained in 80 design evaluations.
STAR-CCM+ solution showing shear stress at wall of naval cavity during inhaling. Shear stress is high in passages with narrow cross-sections where velocity is high.
Polyhedral mesh for flow simulation in a human respiratory system (nasal cavity up to hypopharynx).The geometry was obtained from CT-data using software Mimics from Materialise and imported into STAR-CCM+ in STL-format (surface triangulation).
A direct numerical simulation of the buoyancy driven turbulent flow inside a horizontal annular cavity at higher Rayleigh number, Ra = 1.18x109, and the cylinders ratio of 4.87 has been carried out using the commercial code STAR-CCM+. Kinetic energy budgets have been calculated to verify the accuracy of the unstructured finite volume code on polyhedral cells in Direct Numerical Simulation (DNS) mode. Comparison of DNS results with wall resolved Unsteady RANS (URANS) models shows that the later models are able to capture the general flow features but fail to predict the large unsteadiness and...