Search results

1 – 10 of 101
Content available
Article
Publication date: 1 December 2006

J.H. Ling

75

Abstract

Details

Circuit World, vol. 32 no. 4
Type: Research Article
ISSN: 0305-6120

Keywords

Open Access
Article
Publication date: 5 November 2021

Darko Lovrec and Vito Tič

Apart from the basic material properties of liquid lubricants, such as, e.g., the viscosity and density of the hydraulic fluid, it is also important to have information regarding…

2830

Abstract

Purpose

Apart from the basic material properties of liquid lubricants, such as, e.g., the viscosity and density of the hydraulic fluid, it is also important to have information regarding the electrical properties of the fluid used. The latter is closely related to the purpose, type, structure, and conditions of use of a hydraulic system, especially the powertrain design and fluid condition monitoring. The insulating capacity of the hydraulic fluid is important in cases where the electric motor of the pump is immersed in the fluid. In other cases, on the basis of changing the electrical conductive properties of the hydraulic fluid, we can refer its condition, and, on this basis, the degree of degradation.

Design/methodology/approach

The paper first highlights the importance of knowing the electrical properties of hydraulic fluids and then aims to compare these properties, such as the breakdown voltage of commonly used hydraulic mineral oils and newer ionic fluids suitable for use as hydraulic fluids.

Findings

Knowledge of this property is crucial for the design approach of modern hydraulic compact power packs. In the following, the emphasis is on the more advanced use of known electrical quantities, such as electrical conductivity and the dielectric constant of a liquid.

Originality/value

Based on the changes in these quantities, we have the possibility of real-time monitoring the hydraulic fluid condition, on the basis of which we judge the degree of fluid degradation and its suitability for further use.

Details

Industrial Lubrication and Tribology, vol. 74 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Content available

Abstract

Details

Microelectronics International, vol. 16 no. 1
Type: Research Article
ISSN: 1356-5362

Keywords

Open Access
Article
Publication date: 29 June 2021

C. Ahamed Saleel, Saad Ayed Alshahrani, Asif Afzal, Maughal Ahmed Ali Baig, Sarfaraz Kamangar and T.M. Yunus Khan

Joule heating effect is a pervasive phenomenon in electro-osmotic flow because of the applied electric field and fluid electrical resistivity across the microchannels. Its effect…

594

Abstract

Purpose

Joule heating effect is a pervasive phenomenon in electro-osmotic flow because of the applied electric field and fluid electrical resistivity across the microchannels. Its effect in electro-osmotic flow field is an important mechanism to control the flow inside the microchannels and it includes numerous applications.

Design/methodology/approach

This research article details the numerical investigation on alterations in the profile of stream wise velocity of simple Couette-electroosmotic flow and pressure driven electro-osmotic Couette flow by the dynamic viscosity variations happened due to the Joule heating effect throughout the dielectric fluid usually observed in various microfluidic devices.

Findings

The advantages of the Joule heating effect are not only to control the velocity in microchannels but also to act as an active method to enhance the mixing efficiency. The results of numerical investigations reveal that the thermal field due to Joule heating effect causes considerable variation of dynamic viscosity across the microchannel to initiate a shear flow when EDL (Electrical Double Layer) thickness is increased and is being varied across the channel.

Originality/value

This research work suggest how joule heating can be used as en effective mechanism for flow control in microfluidic devices.

Details

Frontiers in Engineering and Built Environment, vol. 1 no. 2
Type: Research Article
ISSN: 2634-2499

Keywords

Content available

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 58 no. 3
Type: Research Article
ISSN: 0003-5599

Content available
Article
Publication date: 16 November 2012

130

Abstract

Details

Circuit World, vol. 38 no. 4
Type: Research Article
ISSN: 0305-6120

Content available
Article
Publication date: 1 March 2003

Jon Rigelsford

61

Abstract

Details

Sensor Review, vol. 23 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Content available
Article
Publication date: 20 November 2009

Martin Goosey

63

Abstract

Details

Circuit World, vol. 35 no. 4
Type: Research Article
ISSN: 0305-6120

Content available
Article
Publication date: 18 September 2009

Martin Goosey

52

Abstract

Details

Soldering & Surface Mount Technology, vol. 21 no. 4
Type: Research Article
ISSN: 0954-0911

Content available

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 54 no. 6
Type: Research Article
ISSN: 0003-5599

1 – 10 of 101