On the validity of the Onsager reciprocal relations for simultaneous heat transfer and multi-component diffusion

2007 ◽  
Vol 385 (2) ◽  
pp. 487-492 ◽  
Author(s):  
George D. Verros
Keyword(s):  
Heat Transfer ◽  
Reciprocal Relations ◽  
Simultaneous Heat ◽  
Onsager Reciprocal Relations

scholarly journals Simultaneous Heat Transfer by Radiation and Conduction

1967 ◽  
Vol 31 (10) ◽  
pp. 988-994,a1
Author(s):  
Makoto Nishimura ◽  
Masanobu Hasatani ◽  
Sachio Sugiyama
Keyword(s):  
Heat Transfer ◽  
Heat Transfer By Radiation ◽  
Simultaneous Heat

The Coupling Effect of Driving Forces to the Anti-Gravity Flow in the Spiral Micro-Channel

2011 ◽  
Author(s):  
Yan Li ◽  
Shuchao Zhang ◽  
Ning Mei
Keyword(s):  
Driving Force ◽  
Driving Forces ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Horizontal Tube ◽  
Gravity Flow ◽  
Micro Channel ◽  
Reciprocal Relations ◽  
Coupling Relationship ◽  
Onsager Reciprocal Relations

In this paper, the anti-gravity flow in the spiral micro-channel on the surface of horizontal tube was visualized by the three-dimensional ultra-microscope system. The coupling relationship between the driving force and the flow was studied by Onsager reciprocal relations. The results show that the formation of the anti-gravity flow in the spiral micro-channel on the surface of horizontal tube is impacted by the combining effect of several factors, such as the capillary pressure, wettability, temperature, and bubbles.

Multi-Compartment Cooling∕Warming Garment for Human Thermal Dynamic Research and Medical Applications

2008 ◽  
Vol 2 (2) ◽  
Author(s):  
Victor S. Koscheyev ◽  
Gloria R. Leon ◽  
Joo-Young Lee ◽  
Joe M. Warpeha ◽  
Daniel A. Saltzman
Keyword(s):  
Heat Transfer ◽  
The Body ◽  
Heat Extraction ◽  
Thermal Environments ◽  
Body Regions ◽  
Cooling Garment ◽  
Conductive Properties ◽  
Occupational Settings ◽  
Thermal Stimuli ◽  
Simultaneous Heat

Human thermoregulatory research is fraught with multifaceted physiological issues. A notable quandary is the fact that the human body has several different types of tissues, each with unique heat transfer/conductive properties. The primary goal of our research is to determine how to effectively and appropriately regulate human thermal physiology in the context of medical, occupational, and sporting fields. Of paramount importance is quantifying heat extraction/insertion from various body regions under different heat surplus/deficit situations imposed by environmental conditions and/or metabolic fluctuations, and understanding the associated mechanisms and their relationships. Our laboratory has conducted research involving the simulation of contradictory thermal regimes on the body surface to observe the dynamic process of simultaneous heat insertion and extraction. To achieve this, we have designed a tubing cooling/warming garment through which water circulates and controller (patent #7,089,995) that can provide the desired thermal stimuli in uniform/non-uniform and symmetrical/non-symmetrical patterns. We believe this methodology of divided surfaces for the application of concurrent cooling/warming regimes affords the greatest opportunity to quantify the maximum zonal capabilities for heat transfer. This paradigm allows for the regulation of heat flow in dynamic non-uniform conditions and is particularly suited for the comfort/support of a range of clinical populations (e.g., surgical, multiple sclerosis, burns/trauma, hyper/hypothermia). It is also applicable for the design of protective clothing for personnel in occupational settings (e.g., military, firefighting, space flyers), and for sporting apparel (i.e., a cooling garment/hood/blanket). Our laboratory has used the physiologically designed cooling/warming garment to evaluate individual thermoregulatory profiles elicited by conditions representative of extreme terrestrial and space thermal environments.

scholarly journals The effect of mixed convection on the thermal field of horizontal channel flow

2018 ◽  
Vol 180 ◽  
pp. 02019 ◽  
Author(s):  
Jakub Devera ◽  
Tomáš Hyhlík
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Thermal Field ◽  
Water Film ◽  
Temperature Fields ◽  
Bottom Surface ◽  
Complex Flow ◽  
Transient Behaviour ◽  
Speed Flow ◽  
Simultaneous Heat

An experimental study was conducted to investigate the thermal field of low-speed flow of moistair in a horizontal rectangular duct, uniformly heated from below (Poiseuille–Benard flow). Averaged temperature fields were measured in vertical mid-plane using thermocouples. The buoyancy-induced secondary flow is interacting with forced Poiseuille flow which leads to complex flow behaviour with flow reversal along the top surface. Two types of bottom boundary conditions were examined: aluminium plate (only heat transfer) and water film (simultaneous heat and mass transfer) heated to the same temperature. Presence of mass transfer causes stronger transient behaviour above the bottom surface and enhancing of heat transfer, but the overall character of the thermal field remains the same as in case of heat transfer only.

Sign in / Sign up

Export Citation Format

Share Document