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Dynaflow, Inc.

Jessup, Maryland, US

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.

Publications:

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... Show more »

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.

Publications:

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.

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Environmental Contaminant Measurement
Price on request

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... Show more »

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

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Chemical Analysis
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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),... Show more »

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).

  • Perkin Elmer Clarus 500 Gas Chromatograph with Flame Ionization Detector (FID) and Photo-Ionization Detector (PID)
  • Perkin Elmer Clarus 500 Mass Spectrometer with EI/CI capabilities
  • Thermo Gynesys 10S UV/Vis Spectrophotometer
  • BioRad MiniProtean 3 Electrophoresis Cell
  • Digital biological microscope
  • Fume hood
  • 2 Gow-Mac Flame Ionization Detectors and electrometer
  • A Mettler balance and a Centrifuge
  • Wet chemistry analysis.
  • Autoclave, incubator and shaker water bath
  • Thermo E-Pure water purification unit
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Segmented Flow Analysis
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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:

  • A 72 ft x 5 ft x 4.5 ft wind wave tank with a flapper plate type wave... Show more »

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:

  • A 72 ft x 5 ft x 4.5 ft wind wave tank with a flapper plate type wave maker at one end. Its side walls are made of plexiglas which allow for optical access. Waves of Froude number scaled significant wave height and modal period corresponding to any of the 8 Sea States of the NATO Sea State Table. Installation of a sloping floor of adjustable angle enables generation of plunging and spilling breaking waves to simulate the sloping bottom of the surf zone.
  • A high flow rate recirculating flow loop with Plexiglas test section for studying different flow phenomena driven by two 15 hp pumps that can be configured in serial or parallel, each pump is capable of 500gpm at 40 psi.
  • An 80 ft long, 2 ft x 2 ft towing tank with Plexiglas walls over all its length, the towing system can move carriage over 3.5 m/s
  • Particle Image Velocimetry (PIV), Particle Tracking Velocimetry (PTV), and Particle counting systems with a 12 bit CCD camera with a resolution of 1392 x 1024 pixels and a dual-head Nd-YAG laser, with a maximum energy output up to 45 mJ per pulse at 532 nm.
  • IDT Y-3 monochrome high speed video imaging system capable of frame rate from 2,000fps (1280 x 1024 pixels) to 130,000 fps (1280 x 16); the camera can be synchronized with a MiDAS data acquisition system.
  • Redlake Motion Scope PCI high speed video imaging system with a monochrome and color cameras capable of frame rates up to 8,000 and 2,000 frames/sec, respectively; a MiDAS integrated data acquisition system with 8 analog and 6 digital input channels and a 1.25 MHz maximum sampling rate.
  • 2 HYCAM high speed movie cameras capable of 40,000 quarter frames/sec.
  • Other flow visualization equipment includes Machida borescopes and high intensity lighting source.
  • Other digital still and video photographic equipment.
  • Several frequency generators and digital storage oscilloscopes including a Gould 4-channel 20 MHz digital storage oscilloscope, a Tektronix 2 channel digital oscilloscope, a Tektronix 2-channel Spectrum Analyzer/digital storage oscilloscope.
  • Other supporting data acquisition equipment, instrumentation, and sensors including different types of data acquisitions systems, flow meters, pressure gauges, sensitive hydrophones, and high frequency transducers.
  • Plexiglas vacuum cells with electric spark discharge for explosion and cavitation bubble dynamics studies.
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High Load Strain Testing
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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... Show more »

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:

  • Compressive stress-strain curves,
  • Tests up to material fracture
  • Strain rates in the thousands of in/in/sec

Recent Applications Include:

  • Composite materials
  • Ship propellers materials
  • Coating Materials
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Erosion Testing
Price on request

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,... Show more »

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:

  • Various ASTM1 Standard Erosion Testing including ASTM G-32 “Test Method for Cavitation Erosion Using Vibratory Apparatus”, ASTM G-73 “Liquid impingement erosion test”, and ASTM G-134 “Test Method for Erosion of Solid Materials by a Cavitating Liquid Jet”, etc.
  • Cavitating Jet Erosion Testing using DynaJets®
  • Droplet Impact Erosion Testing using DynaJets®
  • Accelerated testing - compressing the effects of years of service life into hours of testing
  • Simulated harsh environment, replicating the effect of harsh conditions in controlled laboratory environment
  • Split Hopkinson Pressure Bar (SHPB) Tests for the study of high strain rate material properties
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Chemistry and Materials
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Analytical Chemistry Services
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Material Testing Services
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Engineering and Fabrication
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Physical Analysis Methods
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Fluid Analysis
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Geological Sciences
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Environmental Science
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