Surface Tension and Liquid Viscosity of R32+R1234yf and R32+R1234ze

2016 ◽  
Vol 61 (2) ◽  
pp. 950-957 ◽  
Author(s):  
Junwei Cui ◽  
Shengshan Bi ◽  
Xianyang Meng ◽  
Jiangtao Wu
Keyword(s):  
Surface Tension ◽  
Liquid Viscosity

scholarly journals The effect of viscosity and surface tension on inkjet printed picoliter dots

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31708-31719 ◽  
Author(s):  
Sarah Krainer ◽  
Chris Smit ◽  
Ulrich Hirn
Keyword(s):  
Surface Tension ◽  
Inkjet Printing ◽  
Liquid Viscosity

In this study, we investigated the effect of liquid viscosity and surface tension for inkjet printing on porous cellulose sheets.

Experimental Investigation of Droplet Dynamics on Solid Surfaces: Spreading and Recoil Effects

2006 ◽  
Author(s):  
Kalpak P. Gatne ◽  
Milind A. Jog ◽  
Raj M. Manglik
Keyword(s):  
Surface Tension ◽  
High Speed ◽  
Lower Surface ◽  
Video Camera ◽  
Temporal Variations ◽  
Liquid Viscosity ◽  
Viscous Effects ◽  
Droplet Dynamics ◽  
Digital Video Camera ◽  
The Impact

A study of the normal impact of liquid droplets on a dry horizontal substrate is presented in this paper. The impact dynamics, spreading and recoil behavior are captured using a high-speed digital video camera at 2000 frames per second. A digital image processing software was used to determine the drop spread and height of the liquid on the surface from each frame. To ascertain the effects of liquid viscosity and surface tension, experiments were conducted with four liquids (water, ethanol, propylene glycol and glycerin) that have vastly different fluid properties. Three different Weber numbers (20, 40, and 80) were considered by altering the height from which the drop is released. The high-speed photographs of impact, spreading and recoil are shown and the temporal variations of dimensionless drop spread and height are provided in the paper. The results show that changes in liquid viscosity and surface tension significantly affect the spreading and recoil behavior. For a fixed Weber number, lower surface tension promotes greater spreading and higher viscosity dampens spreading and recoil. Using a simple scale analysis of energy balance, it was found that the maximum spread factor varies as Re1/5 when liquid viscosity is high and viscous effects govern the spreading behavior.

Surface tension calculation from liquid viscosity data of silanes

2018 ◽  
Vol 463 ◽  
pp. 11-17 ◽  
Author(s):  
Giovanni Di Nicola ◽  
Mariano Pierantozzi ◽  
Sebastiano Tomassetti ◽  
Gianluca Coccia
Keyword(s):  
Surface Tension ◽  
Viscosity Data ◽  
Liquid Viscosity

The Effect of Type of Working Fluid on the Heat Transport Capacity of a Micro Heat Pipe

2005 ◽  
Author(s):  
Sugumar Dharmalingam ◽  
Kek Kiong Tio
Keyword(s):  
Surface Tension ◽  
Heat Pipe ◽  
Heat Transport ◽  
Operating Temperature ◽  
Working Fluid ◽  
Liquid Viscosity ◽  
Transport Capacity ◽  
Temperature Range ◽  
Controlling Effect ◽  
Micro Heat Pipe

In order to elucidate the effects of working fluid’s properties on the heat transport capacity of a micro heat pipe, 3 commonly used fluids are selected for this study: water, ammonia and methanol. From the results obtained, it shows that for operating temperatures lower than 50°C, ammonia is preferred, but if the operating temperature exceeds 50°C, water is more suitable in transferring heat. Over the temperature range of 20°C∼100°C, the behavior of the heat transport capacity is found to be dominated by a property which is the ratio of the working fluid’s surface tension and liquid viscosity. This property which has the dimension of velocity has a controlling effect on the working fluid’s rate of circulation and therefore, the heat transport capacity.

Effects of liquid viscosity and surface tension on atomization in two-phase, gas/liquid fluid coker nozzles

Fuel ◽  
2010 ◽  
Vol 89 (8) ◽  
pp. 1872-1882 ◽  
Author(s):  
C.E. Ejim ◽  
M.A. Rahman ◽  
A. Amirfazli ◽  
B.A. Fleck
Keyword(s):  
Surface Tension ◽  
Liquid Viscosity ◽  
Two Phase

scholarly journals Energy equilibrium analysis in the effervescent atomization

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 925-932
Author(s):  
Runze Duan ◽  
Ziwei Feng ◽  
Hongbin Duan ◽  
Huiru Qu ◽  
Liting Tian ◽  
...  
Keyword(s):  
Surface Tension ◽  
Flow Characteristics ◽  
Equilibrium Analysis ◽  
Liquid Viscosity ◽  
Sauter Mean Diameter ◽  
Mean Diameter ◽  
Compressed Gas ◽  
Energy Equilibrium ◽  
Swirl Atomizer ◽  
Gas Expansion

Abstract In this paper, the flow characteristics and energy equilibrium analysis of the effervescent atomization had been investigated theoretically and experimentally. The effect of the gas–liquid rate (GLR from 0.04 to 0.15) on the atomization stability was revealed. When the GLR was small, the atomization was unstable. The atomization was gradually stable with an increase in the GLR. The optimal atomization region can be obtained. The Sauter mean diameter (SMD) of the droplets was measured by the phase Doppler analyzer. The SMD decreases with an increase in the GLR. The energy equilibrium analysis was investigated for the swirl atomizer theoretically and experimentally. The results show that the energy dissipation terms are mainly compressed gas expansion, liquid viscosity dissipation, and resistance losses. However, the ratio of the spray kinetic energy and the surface tension energy to the total energy is small.

Axisymmetric and non-axisymmetric instability of an electrified viscous coaxial jet

2009 ◽  
Vol 632 ◽  
pp. 199-225 ◽  
Author(s):  
FANG LI ◽  
XIE-YUAN YIN ◽  
XIE-ZHEN YIN
Keyword(s):  
Surface Tension ◽  
Electric Field ◽  
Wavelength Region ◽  
Radial Electric Field ◽  
Liquid Viscosity ◽  
Long Wavelength ◽  
Chebyshev Spectral Collocation ◽  
Chebyshev Spectral Collocation Method ◽  
Axisymmetric Instability ◽  
Helical Mode

A linear study is carried out for the axisymmetric and non-axisymmetric instability of a viscous coaxial jet in a radial electric field. The outer liquid is considered to be a leaky dielectric and the inner a perfect dielectric. The generalized eigenvalue problem is solved and the growth rate of disturbance is obtained by using Chebyshev spectral collocation method. The effects of the radial electric field, liquid viscosity, surface tension as well as other parameters on the instability of the jet are investigated. The radial electric field is found to have a strong destabilizing effect on non-axisymmetric modes, especially those having smaller azimuthal wavenumbers. The helical mode becomes prevalent over other modes when the electric field is sufficiently large. Non-axisymmetric modes with high azimuthal wavenumbers may be the most unstable at zero wavenumber. Liquid viscosity has a strong stabilizing effect on both the axisymmetric and non-axisymmetric instability. Relatively, the helical instability is less suppressed and therefore becomes predominant at high liquid viscosity. Surface tension promotes the instability of the para-sinuous mode and meanwhile suppresses the helical and the other non-axisymmetric modes in long wavelength region.

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