scholarly journals Experimental demonstration of hydraulic jump control in liquid metal channel flow using Lorentz force

2018 ◽  
Vol 30 (6) ◽  
pp. 067104 ◽  
Author(s):  
A. E. Fisher ◽  
E. Kolemen ◽  
M. G. Hvasta
Keyword(s):  
Liquid Metal ◽  
Lorentz Force ◽  
Channel Flow ◽  
Hydraulic Jump ◽  
Experimental Demonstration

Flexible Valveless Pump for Bio Applications

2019 ◽  
Author(s):  
Masoud Naghdi ◽  
Farhad Farzbod ◽  
Paul M. Goggans
Keyword(s):  
Liquid Metal ◽  
Lorentz Force ◽  
Permanent Magnets ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Electrical Current ◽  
Electromechanical Actuators ◽  
Valveless Pump ◽  
Metal Wires ◽  
Lorentz Force Law

Abstract In electromechanical actuators Lorentz force law is used to convert electrical energy into rotational or linear mechanical energy. In these conventional electromechanical actuators, rigid wires conducts the electrical current and as such the types of motion generated by these actuators are limited. Recent advances in liquid metal alloys permit designing electrical wires that are stretchable. These flexible wires have been used to fabricate various flexible connections, sensors and antennas. However, there have been very little efforts to use these stretchable liquid metal wires as actuators. Building upon our previous work in this area, we have made a flexible pump which can be used in bio applications. In this design we placed a flexible polymeric substrate filled by liquid metal Galinstan between two permanent magnets. Since the pump should convey the biological cells suspended along the fluid flow, utilizing check valves may increase the risk of clog in the inlet or outlet. Therefore, our design is based on the nozzle/diffuser concept. This new pump can be considered as a peristaltic and valve-less mechanical pumps which utilizes the Lorentz force law as the actuating mechanism.

Classical hydraulic jump: free surface profile

1993 ◽  
Vol 20 (3) ◽  
pp. 536-539 ◽  
Author(s):  
Willi H. Hager
Keyword(s):  
Free Surface ◽  
Channel Flow ◽  
Hydraulic Jump ◽  
Simple Formula ◽  
Open Channel ◽  
Surface Profile ◽  
Novel Approach ◽  
Flow Hydraulics ◽  
Channel Surface ◽  
Free Surface Profile

Based on a large number of experiments, a simple formula is developed for the time-averaged free surface profile of a classical hydraulic jump. This novel approach is based on the length of the roller. The resulting surface profile fits the data well for usual inflow Froude numbers in the range of 2 to 10. Key words: backwater, channel flow, hydraulics, open channel, surface profile.

scholarly journals Drag reduction in turbulent channel flow using bidirectional wavy Lorentz force

2014 ◽  
Vol 57 (11) ◽  
pp. 2133-2140 ◽  
Author(s):  
LePing Huang ◽  
KwingSo Choi ◽  
BaoChun Fan ◽  
YaoHui Chen
Keyword(s):  
Drag Reduction ◽  
Lorentz Force ◽  
Channel Flow ◽  
Turbulent Channel Flow

scholarly journals Manufacture of Locally Reinforced Composite Discs by Casting in the Alternating Electromagnetic Field

2015 ◽  
Vol 2015 ◽  
pp. 1-7
Author(s):  
Slawomir Golak
Keyword(s):  
Electromagnetic Field ◽  
Liquid Metal ◽  
System Design ◽  
Aluminium Alloy ◽  
Lorentz Force ◽  
New Method ◽  
Process Theory ◽  
Particle Reinforcement ◽  
Reinforced Composite ◽  
Casting System

The paper discusses a new method of obtaining local particle reinforcement in the composite discs. In this method, the liquid composite suspension is poured into a mould and then exposed to the alternating electromagnetic field. The Lorentz force acting on the liquid metal causes the reinforcement to move towards one or both surfaces of the manufactured disc. The paper presents the process theory, the methodology for the casting system design, and the results of an experimental manufacture of one-side and two-side reinforced composite discs made of aluminium alloy.

The undular hydraulic jump in turbulent open channel flow at large Reynolds numbers

2003 ◽  
Vol 15 (3) ◽  
pp. 730-735 ◽  
Author(s):  
Wolfgang Grillhofer ◽  
Wilhelm Schneider
Keyword(s):  
Channel Flow ◽  
Hydraulic Jump ◽  
Open Channel ◽  
Open Channel Flow ◽  
Reynolds Numbers
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