Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Nicholas T. Wimer"'
Autor:
Caelan Lapointe, Nicholas T. Wimer, Sam Simons-Wellin, Jeffrey F. Glusman, Gregory B. Rieker, Peter E. Hamlington
Publikováno v:
Fluids, Vol 6, Iss 9, p 323 (2021)
Fires are complex multi-physics problems that span wide spatial scale ranges. Capturing this complexity in computationally affordable numerical simulations for process studies and “outer-loop” techniques (e.g., optimization and uncertainty quanti
Externí odkaz:
https://doaj.org/article/9684f11ef4a84a1ea1ad34b8034e5f30
Autor:
Jeffrey F. Glusman, Kyle E. Niemeyer, Amanda S. Makowiecki, Nicholas T. Wimer, Caelan Lapointe, Gregory B. Rieker, Peter E. Hamlington, John W. Daily
Publikováno v:
Frontiers in Mechanical Engineering, Vol 5 (2019)
New skeletal chemical kinetic models have been obtained by reducing a detailed model for the gas-phase combustion of Douglas Fir pyrolysis products. The skeletal models are intended to reduce the cost of high-resolution wildland fire simulations, wit
Externí odkaz:
https://doaj.org/article/a3eb5e867919485e9abb86277a140785
Publikováno v:
Journal of Fluid Mechanics. 950
Using numerical simulations, we investigate the near-field temporal variability of axisymmetric helium plumes as a function of inlet-based Richardson ( ${Ri}_0$ ) and Reynolds ( ${Re}_0$ ) numbers. Previous studies have shown that ${Ri}_0$ plays a le
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79582b476233dad3596963e0edca14e2
https://doi.org/10.1017/jfm.2022.788
https://doi.org/10.1017/jfm.2022.788
Publikováno v:
International Journal of Engine Research. 23:1503-1521
Conventional compression-ignition (CI) engines have long offered high thermal efficiencies and torque across a wide range of loads, but often require extensive exhaust gas treatment that decreases efficiency to meet ever-increasing emissions regulati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d5dd79eee91275cb7ee1ebdf8628628
https://doi.org/10.1177/14680874211019345
https://doi.org/10.1177/14680874211019345
Autor:
Nicholas T. Wimer, Marcus S. Day, Amanda S. Makowiecki, Peter E. Hamlington, Caelan Lapointe, Michael Meehan, Gregory B. Rieker, John W. Daily, Jeffrey F. Glusman
Publikováno v:
Theoretical and Computational Fluid Dynamics. 35:61-91
The physical characteristics and evolution of a large-scale helium plume are examined through a series of numerical simulations with increasing physical resolution using adaptive mesh refinement (AMR). The five simulations each model a 1-m-diameter c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56161aa1a17b0d9957a0ca1cef8a0718
https://doi.org/10.1007/s00162-020-00548-6
https://doi.org/10.1007/s00162-020-00548-6
Autor:
Nicholas T. Wimer, Mark Strobel, Siddharth P. Nigam, Peter E. Hamlington, Jason D. Christopher, Gregory B. Rieker, Caelan Lapointe, Aniruddha A. Upadhye, Torrey R. S. Hayden
Publikováno v:
Combustion Science and Technology. 192:997-1014
Combustion-based processing of polymer films and other materials often requires temporal and spatial uniformity of the combustor. We characterize the temperature and H2O mole fraction of the buoyan...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ca26a9cc5d39c29659a923b6e6e5856
https://doi.org/10.1080/00102202.2019.1604518
https://doi.org/10.1080/00102202.2019.1604518
Autor:
Gregory B. Rieker, Olga A. Doronina, Torrey R. S. Hayden, Nicholas T. Wimer, Peter E. Hamlington, Ian Grooms, Dan Petrykowski, Caelan Lapointe, Jason D. Christopher
Publikováno v:
Experiments in Fluids. 62
Given spatially sparse or lower dimensional experimental measurements, approximate Bayesian computation (ABC) and numerical simulations can be used to estimate unknown characteristics of complex multi-physics engineering systems. Here, we describe th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::049b49096f857dc3bfe7333732365760
https://doi.org/10.1007/s00348-020-03122-2
https://doi.org/10.1007/s00348-020-03122-2
Autor:
Mark Strobel, Aniruddha A. Upadhye, Peter E. Hamlington, Torrey R. S. Hayden, Siddharth P. Nigam, Gregory B. Rieker, Nicholas T. Wimer, Jason D. Christopher, Caelan Lapointe
Publikováno v:
Journal of Fluid Mechanics. 895
Prior research has shown that buoyant jets and plumes ‘puff’ at a frequency that depends on the balance of momentum and buoyancy fluxes at the inlet, as parametrized by the Richardson number. Experiments have revealed the existence of scaling rel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbd489ed45afff597043ad7cc695ba67
https://doi.org/10.1017/jfm.2020.271
https://doi.org/10.1017/jfm.2020.271
Autor:
Gregory B. Rieker, Aniruddha A. Upadhye, A. Sanchez, Torrey R. S. Hayden, Siddharth P. Nigam, Mark Strobel, Jason D. Christopher, Peter E. Hamlington, Caelan Lapointe, Dan Petrykowski, Nicholas T. Wimer
Publikováno v:
Proceedings of the Combustion Institute. 37:1571-1578
Industrial flame treatment is a common technique for oxidizing polymer films to improve adhesion and wettability. These processes are strongly influenced by flame properties such as temperature and the concentration of key combustion radicals (e.g.,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e624e9ca0d87f09dc93cd7c3edceb78
https://doi.org/10.1016/j.proci.2018.05.058
https://doi.org/10.1016/j.proci.2018.05.058
Autor:
Nicholas T. Wimer, Jason D. Christopher, Torrey R. S. Hayden, Nathan A. Malarich, Peter E. Hamlington, Caelan Lapointe, Siddharth P. Nigam, Gregory B. Rieker, Dan Petrykowski
Publikováno v:
Applied Physics B. 125
Hydroxyl radical (OH) is a key intermediate reactive species during combustion processes relevant to power production, transportation, and manufacturing. We demonstrate an OH sensor based on in situ laser absorption spectroscopy for deployment in ind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04151845a93bdc24859e7d039cee6134
https://doi.org/10.1007/s00340-019-7341-6
https://doi.org/10.1007/s00340-019-7341-6