Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Engineering
Design And Validation Of Pressure Based Flow Rate Soft Sensor For Freeze-Drying, Pasita Pibulchinda, Tong Zhu, Vaibhav Kshirsagar, Alina A. Alexeenko
Design And Validation Of Pressure Based Flow Rate Soft Sensor For Freeze-Drying, Pasita Pibulchinda, Tong Zhu, Vaibhav Kshirsagar, Alina A. Alexeenko
The Summer Undergraduate Research Fellowship (SURF) Symposium
Lyophilization or freeze drying is a process of removing water by sublimation. It is commonly used to extend the shelf life of drugs in the pharmaceutical industry. Because the process is costly and time consuming, precise and efficient pressure, temperature control and drying time estimation are required. It is the goal of freeze-drying to run at maximum capacity while staying within the safe zone by carefully controlling the sublimation rate. Currently, real time estimation of sublimation rate is still challenging. The technique available called Tunable diode laser absorption spectroscopy (TDLAS) is invasive, and requires major modifications. The current study focuses …
Numerical Solver For Multiphase Flows, Victor C B Sousa, Carlo Scalo
Numerical Solver For Multiphase Flows, Victor C B Sousa, Carlo Scalo
The Summer Undergraduate Research Fellowship (SURF) Symposium
The technological development of micro-scale electronic devices is bounded by the challenge of dissipating their heat output. Latent heat absorbed by a fluid during phase transition offers exceptional cooling capabilities while allowing for the design of compact heat exchangers. The understanding of heat transport dynamics in the context of multiphase flow physics is hampered by the limited access to detailed flow features offered by experimental measurements. Computational Fluid Dynamics (CFD) can overcome such difficulties by providing a complete description of the three-dimensional instantaneous flow field. Unfortunately, the majority of the numerical investigations in this field at Purdue are carried out …
Study Of Noise Generation Mechanisms In A Turbulent Jet Through Analysis Of Simulation Data, Adam J. Kmiec, Nitin S Dhamankar, Gregory Blaisdell
Study Of Noise Generation Mechanisms In A Turbulent Jet Through Analysis Of Simulation Data, Adam J. Kmiec, Nitin S Dhamankar, Gregory Blaisdell
The Summer Undergraduate Research Fellowship (SURF) Symposium
Computational simulation techniques produce considerably more information about turbulent jets than experimentation and have the potential to be effective research tools for reducing the noise footprint of jet engine exhaust. There is a need to exploit the large amount of data generated by such simulations to gain a better understanding of the noise generation mechanisms in a jet. Such information can be vital to the design of future noise-reducing nozzle geometries. This project uses the simulation data generated by a large eddy simulation (LES) tool to investigate the creation and propagation of upstream moving sound waves in the potential core …
Two-Equation Two-Fluid Model For Bubbly Flow In A Vertical Channel, Jeffrey Feliszak, Martin Bertodano
Two-Equation Two-Fluid Model For Bubbly Flow In A Vertical Channel, Jeffrey Feliszak, Martin Bertodano
The Summer Undergraduate Research Fellowship (SURF) Symposium
The one-dimensional two-fluid model is widely acknowledged as the most detailed and accurate macroscopic formulation of the thermo-fluid dynamics in nuclear reactor safety analysis. Several thermo-fluid dynamics codes have sprung up based on the one dimensional two-fluid model, such as RELAP5, TRAC, RETRAN, CATHARE, etc. However, these codes are quasi-steady because they lack the short wavelength models that are necessary to make the models well-posed; therefore they must rely on excessive numerical viscosity. Not utilizing short wavelength models causes small wavelength waves to grow quickly to infinity. The project objective is to develop a drafting force model for a one …