Results 21 to 30 of about 6,138,248 (244)

Thermal nonequilibrium and viscous dissipation in the thermal entrance region of a Darcy flow with streamwise periodic boundary conditions

, 2011
The thermal entrance region in a plane-parallel channel filled by a fluid saturated porous medium is investigated with reference to steady forced convection and to a thermal boundary condition given by a wall temperature longitudinally varying with a ...
Barletta A., E. Rossi di Schio, Rossi Di Schio E., ROSSI DI SCHIO, EUGENIA, L. Selmi, A. Barletta, Selmi L., BARLETTA, ANTONIO   +7 more
core   +1 more source

Modeling and Characterization of a Thermally Controlled Iodine Feeding System for Electric Propulsion Applications

Aerospace, 2020
Iodine is considered as a feasible alternative to xenon as a propellant for electric propulsion systems, thanks to its good propulsive performance, high availability, and high storage density.
Manuel Martín Saravia, Luca Bernazzani, Alessio Ceccarini, Alfio Emanuele Vinci, Fabrizio Paganucci   +4 more
doaj   +1 more source

Numerical Study for Buoyancy Effect On Developing in The Entrance Region Horizontal of Eccentric Annulus

Tikrit Journal of Engineering Sciences, 2007
In this research, a numerical study has been done to done to clarify the effect of the eccentric annulus of to two horizontal cylinders on the rate flow the behavior of the thermal boundary layer at the entrance.
Mohammed H. Al-Mosawi, Gazinga F. Al-Barzinji, Ghassan F. Lattif   +2 more
doaj   +1 more source

Thermal Behavior of Carboxymethyl Cellulose Containing Alumina Nanoparticles at the Entrance Region of an Annulus [PDF]

Journal of Applied Fluid Mechanics
This paper investigates the thermal behavior of non-Newtonian nanofluids, specifically carboxymethyl cellulose (CMC) 0.5% and Al₂O₃ nanoparticles, in the fully developed region of a horizontal annulus.
F. Marzban, M. Marzban, K. Mohammadzadeh, A. Abadeh   +3 more
doaj   +1 more source

Examination of Potential of Thermopile-Based Contactless Respiratory Gating

Sensors, 2021
To control the spread of coronavirus disease 2019 (COVID-19), it is effective to perform a fast screening of the respiratory rate of the subject at the gate before entering a space to assess the potential risks. In this paper, we examine the potential of
Qi Zhan, Wenjin Wang, Xiaorong Ding
doaj   +1 more source

Numerical Simulation of Non-Equilibrium Conjugate Heat Transfer in Tubes Partially Filled with Metallic Foams

Journal of Thermal Science and Technology, 2012
Numerical simulation with the Forchheimer flow model and local thermal non-equilibrium model for porous region is performed on forced convective heat transfer in a tube partially filled with metallic foams.
Zhiguo QU, Huijin XU, Wenquan TAO
doaj   +1 more source

Influence of nano-particles addition on hydrodynamics and heat transfer in laminar flow entrance region inside tube

Alexandria Engineering Journal, 2018
The hydrodynamics and heat transfer through isothermal tube entrance region was investigated numerically in the presence of Nano-particles. The study was performed by a computer home-code. This code is based on finite volume method.
Ahmed M. Teamah, Mohamed A. Hassab, Wael M. El-Maghlany   +2 more
doaj   +1 more source

Forced convection in the thermal entrance region of a circular duct with slug flow and viscous dissipation

, 1997
Slug flow forced convection in a circular duct is studied. The effect of viscous dissipation is analysed in the thermal entrance region. The temperature field and the local Nusselt number are determined analytically for any prescribed axial distribution ...
Barletta A., Zanchini E., Enzo Zanchini, Antonio Barletta   +3 more
core   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

FEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta, Hari Baskar Balasubramanian, Amir Pasokh, Marietta Zille   +3 more
wiley   +1 more source