As of 15 January 2024, we have moved to the University of Washington! And with this change also comes a change in name. We will now be the Combustion, Atomization, Multiphase, & Particulate Physics Research & Education (CAMP-PhyRE) Lab at the University of Washington!
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Please join me in congratulating Dr. Meha Setiya! Meha Setiya completed here PhD defense on July 14. She is the first student to complete their doctorate with CAMPhyRE.
Over her time here Dr. Setiya has published 2 journal articles, published 1 peer reviewed proceedings article, and performed several presentations. We are immensely proud of her accomplishments over the last few years. Dr. Setiya. After graduating, she plans to join a start up company AtmosZero in Colorado. Congratulations to CAMPhyRE student Meha Setiya on publishing "Combustion and evaporation of deformable fuel droplets" in the ASME Journal of Heat and Mass Transfer! This work studies the combustion and evaporation of an isolated freely deforming fuel droplet under convective flow. The Direct Numerical Simulation (DNS) results show a net positive effect of deformation on total evaporation rate for both pure evaporation and combustion cases. The enhancement in evaporation rate reaches up to 9% for combustion. Interesting the paper demonstrates that rapid evaporation, as seen in combustion, can delay the process of droplet deformation. That is, less droplet deformation is observed in the combusting droplet compared to the isothermal droplet. The full article can be found at the Journal of Heat and Mass Transfer Vol 145, Issue 10 at this link: https://doi.org/10.1115/1.4062784
Congratulations to CAMPhyRE student Cairen Miranda on publishing "Importance of preferential segregation by aerodynamics in dust rig tests" in the ASME Journal of Fluids Engineering! This work studies a particle injection rig to understand how its design affects particles impingement and rebound from a target plate. The major result concerns how particles respond differently to changes in the flow field based on their diameter. Near the plate, small particles follow the flow streamlines which causes them to both significantly slow down and to disperse in all directions. However, large particles move ballistically, so they impact the plate with nearly the same velocity and orientation they had at the duct exit. (Reynolds Averaged Navier-Stokes) RANS simulations are compared to (Large Eddy Simulations) LES. While RANS are capable of predicting mean particle impact statistics, they display narrower statistical variation than LES, suggesting that particle dispersion is underpredicted in RANS.
The full article can be seen at ASME J. Fluids Engineering, Vol 145, Issue 10 at doi.org/10.1115/1.4062716 Congratulations to CAMPhyRE student Meha Setiya on publishing "Quasi-steady evaporation of deformable liquid fuel droplets" in the journal International Journal of Multiphase Flow! This work investigates the effect of droplet deformation on its evaporation rate under convective flow conditions. These studies utilize interface capturing Direct Numerical Simulation (DNS). This technique accurately simulates the droplet deformation due to aerodynamic stress, allowing for a new and more detailed analysis of droplet evaporation to be performed. The results suggest a correlation between the total evaporation rate and droplet shape with the most deformed droplet seeing a 20% enhancement in evaporation rate. The work also demonstrates how analytical theories such as Palmore (Journal of Heat Transfer, 2022) can be used to explain this phenomenon.
The full article can be found on the journal website at this link: doi.org/10.1016/j.ijmultiphaseflow.2023.104455 Prof Palmore just returned from a very fulfilling trip to Texas. There he visited collaborator Yuaho Xu at Prairie View A&M University and delivered at talk on "High-fidelity fluid dynamics simulation: recent results on droplet evaporation." He also attended the US National Combustion Meeting, this year hosted by Texas A&M University, and presented a poster on recent work in CAMPhyRE.
This work was supported by Virginia Tech's Institute for Critical Technology and Applied Science, via the grant "Effects of Gravity on Droplet Evaporation and Combustion of Liquid Fuels" for which Profs. Palmore and Xu are co-PIs. CAMPhyRE was awarded a grant to work with the Engineering Research and Development Center (ERDC) of the US Army Corps of Engineers on mitigating invasive fish species. The project focuses on deterring fish from entering certain regions of the upper Mississippi River through the use of a controlled sound source. By playing certain types of sound in the water, ERDC plans to deter the invasive fish without the installation of physical barriers (i.e. fences) in the river. This allows the river to remain open to travel for non-invasive fish species and for ships. CAMPhyRE will be responsible for developing computational tools to be able to predict the acoustic signature of the river, and will study how the sound travels in the river. This is important to predict how the sound will be perceived when it reaches the fish, and whether it will be successful in deterring the fish. More details are given in the following article published on the Virginia Tech website.
https://vtx.vt.edu/articles/2022/12/eng-palmore-carp.html Congratulations to CAMPhyRE student Yushu Lin on publishing "Effect of droplet deformation and internal circulation on drag coefficient" in the journal Physical Review Fluids! Here's a brief summary of the article: In the study of sprays, a theoretical gap exists between droplet modeling and reality, especially in high pressure applications like jet engine combustion. In this paper, we used interface-capturing direct numerical simulations of freely deforming droplets to demonstrate the impact of droplet deformation and liquid internal circulation on drag. Over 200% increase in drag can be seen, depending on the conditions studied. We further showed that these phenomena can be quantified by the pressure and the Weber number, and a correlation for droplet drag was obtained based on these factors. The full article can be found on the journal website at this link: https://doi.org/10.1103/PhysRevFluids.7.123602
We're going to ASME IMECE 2022 conference in Columbus, OH. We have gotten 4 papers accepted for publication in the proceeding. These papers mark the first peer-reviewed publications for students from this research group, and I am very excited to share this fact. The papers are
We recently gained funding from the Sloan Scholars Mentoring Grant to support our research on "The motion of inertial particles in canonical flows". The grant will be $17k that will support the studies of our new MS student, Travis Bowman.
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