Dynaflow, Inc.® provides quality research and development services and products in fluid dynamics and material sciences. As a leader in the fields of gas liquid interface dynamics, bubble dynamics, cavitation, fluid structure interactions and erosion dynamics, we offer services and products for the naval and marine, automotive, energy, chemical, environmental and food and agriculture industries. We pursue an inter-disciplinary approach to problems and have strategic collaborations with federal agencies, commercial enterprises and universities.
Chahine, G.L. and Kalumuck, K.M. "Development of a Near Real-Time Instrument for Nuclei Measurement: The ABS Acoustic Bubble Spectrometer®©", 4th Joint ASME-JSME Joint Fluids Engineering Conference, Honolulu, HI, Jul. 6-11, 2003.
Wu, X. and Chahine, G.L. "Development of an Acoustic Instrument for Bubble Size Distribution Measurement", 9th International Conference on Hydrodynamics, Shanghai, China, Oct. 11-15, 2010.
Loraine, G. and Pettigrove, M., "Seasonal Variations in Concentrations of Pharmaceuticals and Personal Care Products in Drinking Water and Reclaimed Wastewater in Southern California", Environmental Science and Technology Vol. 40, 687-695, Feb., 2006.
K.M. Kalumuck and G.L. Chahine, "The Use of Cavitating Jets to Oxidize Organic Compounds in Water", ASME Journal of Fluids Engineering 122, 465-470, Sept., 2000.
Dynaflow has expertise in identification and quantifying polar pharmaceuticals and personal-care-products (PPCP) in water and wastewater, including raw sewage influent. We have analyzed over 500 water and wastewater samples for PPCP; including over 300 using the USGS 1433 method (other methods can be used or developed for special analysis). The Dynaflow laboratory is equipped with a Perkin Elmer Clarus 500 gas chromatograph with mass detector (GC/MS). The Clarus 500 is capable of collecting Total Ion Count (TIC) and Selected Ion Monitoring (SIR) simultaneously, which greatly enhances its utility for identifying unknown compounds and achieving low detection limits
Dynaflow has chemical and microbiology laboratories on-site. Analytical chemistry capabilities include trace organic analysis of water and air using gas chromatography (GC/FID and GC/PID) and mass spectroscopy (GC/MS with EI/CI/NCI). Several water quality analyses are also available including, pH, Total Organic Carbon (TOC), Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Total Phosphorus, Nitrate and Nitrite, Iron, Total Solids (TS), Total Suspended Solids (TSS), and Volatile Suspended Solids (VSS).
Understanding moderate to high speed phenomena such as explosion and cavitation bubble dynamics, liquid drop impact, and vortex and jet flows is facilitated with still, video, and high speed movie photography. Major components of this capability include:
The Split Hopkinson Pressure Bar (SHPB) is used to measure material properties at high loading rates that can differ by an order of magnitude (strain rates in the thousands of in/in/sec) from those for quasi static loading. We offer comprehensive tests and analyses for stress-strain curves at high strain rates.
This testing technique is based on the measurement of elastic strain waves which are transmitted through a system consisting of two long pressure bars with the test specimen sandwiched between the two bars. Our SHPB testing has following characteristics:
Recent Applications Include:
Dynaflow, Inc.® has experience with numerous research projects on materials resistance to erosion by cavitation and liquid droplet impact. Based on our experience, we offer accelerated erosion testing service and consulting services to our customer. We can conduct full range of R&D and consulting studies on material erosion, cavitation, and liquid impacts including analytical, numerical, and experimental work.
Our unique experimental capabilities include:
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