Concept

Velocity

Related publications (354)

Intube Flow Boiling of R-407C and R-407C/Oil Mixtures. Part 2: Plain Tube Results and Predictions

John Richard Thome, Daniel Favrat, Olivier Zürcher

Intube evaporation tests for R-407C and R-407C/oil are reported for a plain copper tube. The tests were run at a nominal inlet pressure of 6.45 bar (93.5 psia) at mass velocities of 100, 200 and 300 kg/m2s (73581, 147162 and 220743 lb/h ft2) over nearly th ...

1998

Flow Boiling in Horizontal Tubes. Part 1; Development of a Diabatic Two–Phase Flow Pattern Map

John Richard Thome, Daniel Favrat

An improved two-phase flow pattern map is proposed for evaporation in horizontal tubes. The new map was developed based on flow pattern data for five different refrigerants covering a wide range of mass velocities and vapor qualities. The new map is valid ...

1998

Local Flow Boiling and Pressure Drop Measurements for R134a/Oil Mixtures Part 1: Evaporating in a Microfin Tube

John Richard Thome, Daniel Favrat

Intube flow boiling experiments for refrigerant R-134a mixed with a lubricating oil are reported. The tests were run at a nominal inlet pressure of 3.4 bar over a wide range of vapor qualities at mass velocities of 100, 200 and 300 kg/m2s (73500, 147000 an ...

1997

Flow Boiling and Pressure Drop Measurements for R134a/Oil Mixtures Part 2: Evaporating in a Plain Tube.

John Richard Thome, Daniel Favrat, Olivier Zürcher

Intube flow boiling experiments for refrigerant R-134a mixed with a lubricating oil are reported for a plain, horizontal tube. The tests were run at a nominal inlet pressure of 3.4 bar over a wide range of vapor qualities at mass velocities of 100, 200, an ...

1997

Flow Boiling of Ammonia in Smooth and Enhanced Horizontal Tubes.

John Richard Thome, Daniel Favrat, Olivier Zürcher

Experimental test results for flow boiling of pure ammonia inside horizontal tubes were obtained for a plain tube and a microfin tube. Tests were run at a nominal saturation temperature of 4°C, mass velocities from 20-140 kg/m2s, vapor qualities from 1-99% ...

1997

Numerical simulations of mixing in an SMRX static mixer

Albert Renken, Thierry Meyer

The present work focuses on the flow characteristics and mixing induced by Sulzer SMRX static mixers. It is obsd. both exptl. and numerically that pressure drop increases linearly with velocity for this mixer type and that, as expected, this effect is ampl ...

1996

Transport in lymphatic capillaries. II. Microscopic velocity measurement with fluorescence photobleaching

Melody Swartz

Despite its relevance to the physiology of lymph formation and propulsion, the instantaneous flow velocity in single lymphatic capillaries has not been measured to date. The method of fluorescence recovery after photobleaching (FRAP) was adapted for this p ...

1996

Low-wavenumber spectral characteristics of velocity and temperature in the atmospheric surface-layer

Marc Parlange, Gabriel George Katul

The structure df atmospheric surface layer turbulence low wavenumbers was analyzed using 56 Hz triaxial velocity and temperature measurements above a uniform dry lake bed, A key feature of this experiment was the, small roughness length of the surface that ...

1995

Comparison of different control strategies and friction compensation algorithms in position and speed controls

Friction is present in almos every motion control application an effect the quality of the position, velocity or force control. This influence depends on the controls strategy itself and on the compensation algorihms that can be added to improve the contro ...

1995

Boiling of R–134 and R–123 in a microfin tube.

John Richard Thome, Daniel Favrat

Local flow boiling heat transfer coefficients were measured for R-134a and R- 123 evaporating inside a microfin tube for horizontal flow and vertical upflow over a wide range of mass velocities, vapor qualities and heat flux. The objective was to study the ...

1995

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