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Research Website of Daniel T. Banuti

News

I am thrilled to have joined Cascade Technologies Inc. and I am looking forward to exciting projects in LES/DNS of high-pressure flows!

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Welcome

Welcome to my research website! My work is focused on thermofluids under extreme conditions, such as supercritical fluids, combustion, high-pressure propulsion analysis and modeling. If you want to find out more, please send me an email, or visit one of my online profiles at LinkedIn | Google Scholar | Researchgate.

While 'supercritical fluids' may sound like a very specialized niche topic, it is actually not: Supercritical fluids are ubiquitous in energy and transportation application, and can be found e.g. in gas turbines, oxy-fuel combustors, rocket engines, and Diesel engines. Supercritical fluids cool power plants, and serve as working fluids in supercritical power cycles. Extraction of oil and CO2 sequestration are supercritical fluids processes. Finally, supercritical fluids can be found in nature, forming the atmosphere of planets like Venus or Jupiter.

Video

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For an introduction to "High-pressure transcritical atomization and combustion", watch the video of my tutorial, held during the 16th Biennial Summer Program (2016) of the Center for Turbulence Research at Stanford University.

Waves
courtesy dlr.de

Supercritical fluids

The main challenge in modeling and understanding is the thermodynamic behavior at high pressures: neither liquid nor ideal gas models remain applicable. Instead, fluid state behavior is governed by real fluid equations of state (such as Peng-Robinson, Redlich-Kwong, etc.), and mixing rules.

However, most approaches are based on heuristics. Fundamental understanding of supercritical fluids, the appropriate choice of state equations, physically applicable mixing rules, and numerical methods to solve the problem in a simulation context are very active regions of research.

The goal of my research is to drive the understanding of high pressure thermodynamics to advance modeling and technical solutions for real world problems in energy, aerospace, and transportation.

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Waves
courtesy jaxa.jp

Key results

Pseudoboiling

A first quantitative analysis of heating processes at supercritical pressure reveals that there is a supercritical transition akin to subcritical vaporization - pseudoboiling [journal]. This is important for the design and interpretation of experimental and numerical test cases. [more]

Thermal jet break-up

The pseudo-boiling phenomenon causes a very strong temperature sensitivity during injection. This gives rise to a thermal break-up mechanism [journal] - in addition to classical mechanical atomization. [more]

Multi-fluid-mixing

For high pressure diffusion flames it can be shown that mixing occurs merely between ideal gases, without the influence of any real gas effects. Multi-fluid-mixing [journal] is a new thermodynamic model that uses this to allow application of high quality equations of state without additional computational cost. [more]

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About

I am currently a Senior Research Scientist at Cascade Technologies Inc., with a focus on LES / DNS of high pressure combustion systems, such as oxy-fuel combustion and rocket engines.

I had the opportunity to work at the Center of Turbulence Research at Stanford University as a Postdoctoral Fellow, where I studied the application of chemical engineering methods and data analysis of molecular dynamics simulations on high pressure fluid behavior and modeling. Technical processes of interest ranged form fuel injection to CO2 sequestration.

Before, I have been a Research Associate at the German Aerospace Center (DLR), Institute of Aerodynamics and Flow Technology, Spacecraft Department in Göttingen, where I did numerical research on combustion and injection in rocket engines, hydrazine thrusters, and hypersonic flow / flow control using energy deposition.

I received my Dr.-Ing. (PhD) degree from the University of Stuttgart (Dissertation) and the Dipl.-Ing. (MSc) from RWTH Aachen University in Germany. While studying for the MSc, I had the opportunity to spend a year as a Graduate Research Trainee at the University of Tennessee Space Institute.

My specialization is Computational Fluid Dynamics, both as a developer and analyst, with particular emphasis on non-ideal flow under extreme conditions (cryogenic, supercritical, hypersonic, reactive, microscale).

Contact

Like any engineer, I am excited about my work and thus more than happy to discuss it! If you want to find out more, please send me an email, or visit one of my online profiles at

LinkedIn | Google Scholar | Researchgate.

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