Year: 2025
Type: article
Abstract: ABSTRACT Characterization of the interface between explosive product gases and ambient air in an explosion is a complicated task due to the turbulent mixing and inherently three‐dimensional expansion of the interface. This study aims to quantify the evolution of the interface as a temporally varying Hausdorff dimension. Two test series were conducted with Composition C‐4 charges with masses of 105 and 880 g. Imaging data were collected from the time of detonation until shock wave detachment using ultra‐high‐speed cameras. Gas cloud profiles were extracted using automated image processing algorithms, and the Hausdorff dimension of these two‐dimensional slices of the gas cloud was then estimated using boxcounting algorithms. When scaled with standard gas dynamic nondimensional scalings, the Hausdorff dimension of all explosive events appears to collapse towards a single curve. The fireball was initially nonfractal and began to develop fractal properties as the shock wave separated from the detonation products. Artificial perturbation of the charged surface had no detectable impact on the evolution of the Hausdorff dimension in the early development of the fireball outside of error, despite visible phenomenological differences in the early development of mixing on the fireball surface.
DOI: 10.1002/prep.12050
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,840
Awards: G1319351997, THE MINORITY SERVING INSTITUTIONS PARTNERSHIP PROGRAM (MSIPP) IS A VITAL PROGRAM WITHIN THE DOE/NNSA MANAGEMENT AND BUDGET, LEARNING AND CAREER MANAGEMENT WHICH AWARDS GRANTS TO MINORITY SERVING INSTITUTIONS (MSI) TO PREPARE NNSA’S NEXT-GENERATION TECHNICAL WORKFORCE. MSIPP ALIGNS INVESTMENTS IN UNIVERSITY CAPACITY AND WORKFORCE DEVELOPMENT WITH DOE/NNSA MISSION AREAS TO DEVELOP THE NEEDED SKILLS AND TALENT FOR DOE/NNSA’S ENDURING TECHNICAL WORKFORCE AND TO ENHANCE RESEARCH AND EDUCATION AT MSIS. THE PROGRAM’S PRIMARY MISSION IS TO CREATE AND FOSTER A SUSTAINABLE STEM-PIPELINE THAT PREPARES A DIVERSE WORKFORCE OF WORLD CLASS TALENT THROUGH STRATEGIC PARTNERSHIPS BETWEEN MINORITY SERVING INSTITUTIONS AND THE DOE/NNSA ENTERPRISE. TO EXECUTE THIS MISSION, MSIPP BUILDS A NETWORK OF NSE READY STUDENTS THROUGH ENRICHMENT ACTIVITIES FROM K-20 TO POST-DOCTORAL LEVEL. THROUGH UNIVERSITY-LAB CONSORTIA PARTNERSHIPS STUDENTS ARE EXPOSED TO CUTTING-EDGE RESEARCH AND ACTIVITIES IN THEIR RELEVANT FIELDS.
THE FOLLOWING MSIPP CRUCIAL SUCCESS FACTORS ARE TO:
1. STRENGTHEN AND EXPAND MSI STEM CAPACITY AND RESEARCH EXPERIENCE IN DOE/NNSA MISSION AREAS OF INTEREST.
2. TARGET COLLABORATIONS BETWEEN MSIS AND DOE/NNSA LABORATORIES AND PLANTS THAT INCREASE SCIENTIST-TO-SCIENTIST INTERACTIONS, VISIBLE PARTICIPATION OF MSI FACULTY IN DOE/NNSA TECHNICAL ENGAGEMENTS AND ACTIVITIES AND PROVIDE MSIS DIRECT ACCESS TO DOE/NNSA FACILITIES RELATIVE TO STEM.
3. GROW THE NUMBER OF MINORITY STUDENTS WHO GRADUATE WITH STEM DEGREES.
4. GROW THE NUMBER OF MINORITY GRADUATES AND POST-DOCTORAL STUDENTS HIRED IN TO DOE/NNSA'S STEM WORKFORCE., G315231313, G3432182617, G6541015203
OpenAlex ID: W4409213390