Zero-G liquid studies - Critical state and drop dynamics
Liquid drop dynamics and critical state of liquid in zero gravity environment
WEIGHTLESSNESS↗
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Results for “drops”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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The Statistical Description of a Spray in Terms of Drop Velocity, Size and Position
Statistical description of spray formation in terms of drop velocity, size and position
SPRAY↗
Leidenfrost film boiling of drops on a moving surface.
Relative velocity effect on vaporization times and heat-transfer coefficients of water drops in Leidenfrost film boiling on heated rotating wheel
VELOCITY MEASUREMENT↗
Drop Hammer Tests with Three Oleo Strut Models and Three Different Shock Strut Oils at Low Temperatures
Drop hammer tests with different shock strut models and shock strut oils were performed at temperatures ranging to -40 C. The various shock strut models do not differ essentially regarding their springing and damping properties at low temperatures; however, the influence of the different shock strut oils on the springing properties at low temperatures varies greatly.
LUBRICATING OILS, MINERAL↗
The statistical modeling of multicomponent-fuel drop evaporation for fuels containing a multitude of species
A statistical formulation is described portraying the composition in an evaporating multi-component-fuel liquid drop and in the gas phase surrounding it.
multi-component drop modeling↗
A priori study of models for large eddy simulations of drop-laden flows
Large Eddy Simulation (LES) models are evaluated on a Direct Numerical Simulation (DNS) database representing a three-dimensional temporal mixing layer with evaporating drops.
drop-laden flows sprays↗
Modeling evaporation of Jet A, JP-7 and RP-1 drops at 1 to 15 bars
A model describing the evaportion of an isolated drop of a multicomponent fuel containing hundreds of species has been developed. The model is based on Continuous Thermodynamics concepts wherein the composition of a fuel is statistically described using a Probability Distribution Function (PDF).
kerosene drops↗
DNS of moderate-temperature gaseous mixing layers laden with multicomponent-fuel drops
A formulation representing multicomponent-fuel (MC-fuel) composition as a Probability Distribution Function (PDF) depending on the molar weight is used to construct a model of a large number of MC-fuel drops evaporating in a gas flow, so as to assess the extent of fuel specificity on the vapor composition.
drop laden jets sprays↗
Direct numerical simulation of a transitional mixing layer laden with multicomponent-fuel evaporating drops using continuous thermodynamics
A model of a temporal three-dimensional mixing layer laden with fuel drops of a liquid containing a large number of species is derived.
thermodyanamics temporal mixing layer drop model d↗
A robust statistical model for the evaporation of multicomponent-fuel drops containing a multitude of chemical species
A statistical formulation is developed describing the composition in an evaporating multicomponent-fuel liquid drop and in the gas phase surrounding it.
Continuous thermo-dynamics CT↗
Finite Amplitude Capillary Waves in a Liquid Drop
A theoretical study of finite amplitude waves in an approximately spherical liquid drop subject to surface tension forces is presented.
finite amplitude waves Capillary Waves Nonlinear I↗
Drop and Bubble Dynamics Investigations on Earth and in Low Gravity Using Ultasonics
Two ultrasonic devices for the positioning and the remote manipulation of free drops and bubbles have been used during the recent STS-94 Spacelab flight.
acoustics ultrasonic waves drop and bubble dynamic↗
Electrostatic Dispersion and Evaporation fo Clusters of Drops of High-Energy Fuel for Soot Control
A model is presented for the electrostatic dispersion fo a polydisperse cluster of evaporating drops embedded into an inviscid vortex.
electrostatic dispersion evaporation evaporating d↗
On Parametrizing the Rain Drop Size Distribution
This paper addresses the problem of finding a parametric for for the rain drop size distribution which 1) is an appropriate model for tropical rainfall, and 2) involves statistically independent parameters.
rain drop size remote sensing↗
Entrainmnet and Evaporation of Drops in the Laminar Part of a Two-dimensional Developing Mixing Layer
A formulation has been developed which combines the simplicity of an experimentally-derived well-established correclation for describing the development of a mixing layer, and a rigorous approach for the description of the dynamics and evaporation of dense or dilute clusters of drops in large coherent vortices.
fixed drop radius air/fuel mass ratio↗
Prediction of dynamic and mixing characteristics of drop-laden mixing layers using DNS and LES
Direct Numerical Simulation (DNS) and Large Eddy Simulation (LES) have been conducted of a temporal mixing layer laden with evaporating drops, in order to assess the ability of LES to reproduce dynamic and mixing aspects of the DNS which affect combustion, independently of combustion models.
large eddy simulation evaporating drops↗
Heat and Mass Transfer for Isolated and Interacting Fluid Drops Under Supercritical Conditions
A model has been developed for the behavior of an isolated fluid drop of a single componet species immersed into another single component species in finite, quiescent surroundings at supercritical condidionts
Heat↗
A New Parametrization of the Rain Drop Size Distribution
This paper revisits the problem of finding a parametric form for the rain drop size distribution (DSD) which 1) is an appropriate model for tropical rainfall, and 2) involves statistically independent parameters. Using TOGA/COARE data, we derive a parametrization which meets these criteria. This new parametrization is an improvement on the one that was derived in [3] using TRMM ground truth data from Darwin, Australia. The new COARE data allows us to verify that the spatial variability fo the two
rain↗