Results 71 to 80 of about 16,649 (214)

Convergence to the Reynolds approximation with a double effect of roughness [PDF]

, 2010
We prove that the lubrication approximation is perturbed by a non-regular roughness of the boundary. We show how the flow may be accelerated using adequate rugosity profiles on the bottom.
Choquet, Catherine, Chupin, Laurent, Gisclon, Marguerite   +2 more
core   +3 more sources

Nanomaterials and Eco‐Friendly Refrigerants in Vapor Compression System: A Review of Performance and Sustainability

Energy Science &Engineering, Volume 14, Issue 5, Page 2644-2666, May 2026.
This review highlights how nano oils and eco‐friendly nano refrigerants enhance energy‐efficient refrigeration by improving thermal conductivity, lubrication, and system performance. The integration of rheological and tribological testing confirms reduced compressor work, better heat transfer, and higher COP using sustainable, low‐GWP refrigerants for ...
Mohammed Dilawar, Bisma Ali, Turali Narayana, Mohammad Reza Chalak Qazani, Rehan Khan, Adnan Qayoum, Tabrez Qureshi, Mohd Mujtaba Ahmed   +7 more
wiley   +1 more source

Influence of Wall Porosity and Surfaces Roughness on the Steady Performance of an Externally Pressurized Hydrostatic Conical Bearing Lubricated by a Rabinowitsch Fluid

International Journal of Applied Mechanics and Engineering, 2017
In the paper, the influence of both the bearing surfaces roughness as well as porosity of one bearing surface on the pressure distribution and load-carrying capacity of a curvilinear, externally pressurized, thrust bearing is discussed.
A. Walicka, E. Walicki, P. Jurczak, J. Falicki   +3 more
doaj   +1 more source

Influence of asperities on fluid and thermal flow in a fracture: a coupled Lattice Boltzmann study

, 2013
The characteristics of the hydro-thermal flow which occurs when a cold fluid is injected into a hot fractured bedrock depend on the morphology of the fracture.
Flekkøy, Eirik Grude, Neuville, Amélie, Toussaint, Renaud   +2 more
core   +3 more sources

Cold EI—The Way to Improve GC‐MS and Increase Its Range of Applications

Mass Spectrometry Reviews, Volume 45, Issue 3, Page 548-582, May/June 2026.
ABSTRACT Gas chromatography‐mass spectrometry (GC‐MS) with Cold electron ionization (EI) is based on interfacing the GC and MS with a supersonic molecular beam (SMB) along with electron ionization of vibrationally cold sample compounds in the SMB in a contact‐free fly‐through ion source (hence the name Cold EI).
Aviv Amirav, Benny Neumark, Oneg Elkabets, Alex Yakovchuk   +3 more
wiley   +1 more source

Basic lubrication equations [PDF]

Lubricants, usually Newtonian fluids, are assumed to experience laminar flow. The basic equations used to describe the flow are the Navier-Stokes equation of motion.
Dowson, D., Hamrock, B. J.
core   +1 more source

Hump‐Shaped Enhancement of Coarse‐Grain Transport in Sediment Mixtures Induced by Fine Grains of Different Sizes

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Bedload transport of sediment mixtures is fundamental to river morphology and impacts aquatic ecology. Adding fine grains enhances coarse‐grain transport, yet controlling mechanisms remain elusive. Employing discrete element simulations, we examine how fine‐grain size and proportion influence coarse‐grain flux.
Yu Zhang, Zheng Gong, Hongbo Ma, Lu Jing, Xudong Fu   +4 more
wiley   +1 more source

Fully coupled simulations of non-colloidal monodisperse sheared suspensions [PDF]

, 2007
In this work we investigate numerically the dynamics of sheared suspensions in the limit of vanishingly small fluid and particle inertia. The numerical model we used is able to handle the multi-body hydrodynamic interactions between thousands of ...
Acrivos, Allen, Batchelor, Brady, Breedveld, Breedveld, Breedveld, Climent, Da Cunha, Dance, Dance, Drazer, Drazer, E. Climent, Leighton, Lomholt, Lomholt, M. Abbas, Marchioro, Maxey, Morris, O. Simonin, Rouyer, Sierou, Verzicco, Wang, Zarraga   +26 more
core   +1 more source

Dynamics of bubble absorption over porous membranes in an immersed medium

Droplet, Volume 5, Issue 2, April 2026.
The dynamics of a bubble interacting with a flat, porous superhydrophobic membrane underwater has been illustrated. Abstract Porous superhydrophobic (SHP) membranes are gaining considerable attention due to their excellent underwater absorption and drag reduction properties. They exploit the Cassie‒Baxter state of wetting to remove the bubble in a fast
Kiran Raj M
wiley   +1 more source

Navigating the Dynamics of Squeeze Film Dampers: Unraveling Stiffness and Damping Using a Dual Lens of Reynolds Equation and Neural Network Models for Sensitivity Analysis and Predictive Insights

Mathematics
The squeeze film damper (SFD) is proven to be highly effective in mitigating rotor vibration as it traverses the critical speed, thus making it extensively utilized in the aeroengine domain.
Haobo Wang, Yulai Zhao, Tongguang Yang, Zhong Luo, Qingkai Han   +4 more
doaj   +1 more source