scholarly journals Steady thermocapillary migration of a droplet in a uniform temperature gradient combined with a radiation energy source at large Marangoni numbers

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
Zuo-Bing Wu
Keyword(s):  
Energy Source ◽  
Temperature Gradient ◽  
Radiation Energy ◽  
Uniform Temperature ◽  
Thermocapillary Migration

scholarly journals DRIVEN DROPLETS BY THERMOCAPILLARY EFFECT: QUADRATIC DEPENDENCE OF THE SURFACE TENSION ON THE TEMPERATURE

Anales AFA ◽  
2020 ◽  
Vol 31 (3) ◽  
pp. 107-111
Author(s):  
J.R. Mac Intyre ◽  
◽  
J.M. Gomba ◽  
C. A. Perazzo ◽  
◽  
...  
Keyword(s):  
Surface Tension ◽  
Temperature Gradient ◽  
Present Article ◽  
Solid Surface ◽  
Linear Dependence ◽  
Complex Dynamics ◽  
Uniform Temperature ◽  
Thermocapillary Effect ◽  
Partial Wetting ◽  
Wetting Fluids

We study the migration of droplets on a solid surface which is under a uniform temperature gradient. The present article focus on partial wetting fluids which surface tension depends on the squared temperature. These type of liquids, called self-rewetting, show a complex dynamics and here we will compare with those liquids of linear dependence in the temperature. Unlike to the latter ones, the droplet width increases with the time.

scholarly journals Effects of Magnetic Field and Non-Uniform Basic Temperature Gradient

2002 ◽  
Vol 1 (1) ◽  
pp. 1-14
Author(s):  
S. Pranesh
Keyword(s):  
Magnetic Field ◽  
Temperature Gradient ◽  
Fluid Layer ◽  
Suspended Particles ◽  
Conducting Fluid ◽  
Wave Number ◽  
Uniform Temperature ◽  
Onset Of Convection ◽  
Electrically Conducting ◽  
Electrically Conducting Fluid

The effects of a non-uniform temperature gradient and magnetic field on the onset of convection in a horizontal layer of Boussinesq fluid with suspended particles confined between an upper free/adiabatic boundary and a lower rigid/isothermal boundary have been considered. A linear stability analysis is performed. The microrotation is assumed to vanish at the boundaries. The Galerkin technique is used to obtain the Eigen values. The influence of various parameters on the onset of convection has been analysed. Six different non-uniform temperature profiles are considered and their comparative influence on onset is discussed. It is observed that the electrically conducting fluid layer with suspended particles heated from below is more stable compared to the classical electrically conducting fluid without Suspended particles. The critical wave number is found to be insensitive to the changes in the parameters but sensitive to the changes in the Chandrasekhar number.

Fundamental Study of Energy Harvesting Using Thermoelectric Effect on Concrete Structure in Road

2014 ◽  
Vol 1044-1045 ◽  
pp. 332-337 ◽  
Author(s):  
Jae Jun Lee ◽  
Dae Hun Kim ◽  
Seung Tae Lee ◽  
Jae Kyu Lim
Keyword(s):  
Climate Change ◽  
Energy Source ◽  
Energy Harvesting ◽  
Temperature Gradient ◽  
Concrete Structure ◽  
Research Topic ◽  
Energy Harvest ◽  
Thermoelectric Effect ◽  
Fundamental Study ◽  
Natural Energy

Energy harvesting from wasting natural energy is a keen interested in research topic in order to find environmentally friendly energy source because of climate change. This paper was investigated energy harvesting issues using thermoelectric technology which used a temperature gradient to generated electricity. This paper describes the investigation of an energy harvest system to be installed on the infrastructure that was constructed with concrete. The system will collect energy from the temperature difference between surface and inside of concrete structure. This paper presents a feasible energy harvesting using the thermoelectric technology on concrete structure in road.

Thermostatics of an elastic Cosserat plate containing a circular hole

1971 ◽  
Vol 70 (1) ◽  
pp. 169-174 ◽  
Author(s):  
İ. T. Gürgöze
Keyword(s):  
Temperature Gradient ◽  
General Theory ◽  
Circular Hole ◽  
Thermal Stresses ◽  
Plate Theory ◽  
The Other ◽  
Uniform Temperature ◽  
Classical Plate Theory ◽  
Cosserat Surface ◽  
Limiting Case

AbstractIn this paper, the general theory of a Cosserat surface given by Green, Naghdi and Wainwright(1), has been applied to the problem of a thermo-elastic Cosserat plate containing a circular hole of radius a. We assume that the major surfaces of the plate and the boundary of the hole are thermally insulated and that a uniform temperature gradient τ exists at infinity. In the limiting case, when h/a → 0, where h is the thickness of the plate, the thermal stresses at the circular hole reduce to those obtained by Florence and Goodier (4), by means of the classical plate theory. Results for the other limiting case h/a → ∞ are also given.

scholarly journals The Temperature And Humidity Relations Of The Cockroach

1938 ◽  
Vol 15 (4) ◽  
pp. 555-563 ◽  
Author(s):  
D. L. GUNN ◽  
C. A. COSWAY
Keyword(s):  
Temperature Gradient ◽  
Temperature Reaction ◽  
Air Humidity ◽  
Moist Air ◽  
Uniform Temperature ◽  
Preferred Temperature ◽  
Dry Air ◽  
Blatta Orientalis ◽  
Temperature And Humidity ◽  
Humidity Reaction

1. In a diffusion gradient of humidity at uniform temperature, some cockroaches (Blatta orientalis, L.) show a tendency to spend more time in the drier region. Other individuals appear to be indifferent to the stimulus of air humidity. 2. On desiccation, there is a tendency for cockroaches to become hygro-positive. 3. In a temperature gradient, those individuals which react to humidity have a slightly but significantly higher preferred temperature in somewhat moist air than they have in dry air. 4. It seems, then, that the observed preferred temperature represents a kind of balance between a pure temperature reaction and a humidity reaction. The change in humidity reaction resulting from desiccation is qualitatively satisfactory to explain the fall in preferred temperature which occurs at the same time.

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