CFD Study of the Flow in a Radial Electrorheological Fluid Clutch

Chen, Shu Mei; Bullough, W. A.

doi:10.1177/1045389x10386988

Cited by 6 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained solutions were then imported into the CFD model for the complementary τ 0 − B g mappings. apparent viscosity model is not capable of the flow field at high yield stress levels and low flow velocities (or at low Reynolds numbers and high Hedstrom numbers [12]). To handle the discontinuity the authors followed the procedure highlighted in [12].…”

Section: Cfd Modelmentioning

confidence: 99%

See 1 more Smart Citation

Pinch Mode Magnetorheological Flow Bench: Fluid Flow Analysis

Goldasz,

Sapinski,

Kubik

et al. 2023

10th ECCOMAS Thematic Conference on Smart Structures and Materials

View full text Add to dashboard Cite

Magnetorheological (MR) fluids are known smart materials. In the presence of magnetic field the material develops a yield stress. The technology has been used in the automotive industry, for example, or high quality optical finishing applications. In the (existing) conventional flow-mode valves the MR fluid is energized by magnetic flux perpendicular to the fluid flow path. The effect is an increase in the material's effective resistance-to-flow. The so-called gradient pinch mode (GPM) follows a different principle -the flux in the flow channel is directed to activate the fluid in the areas adjacent to the channel walls. Then, high yield stresses are induced in the material in the adjacent zones and low yield stresses are achieved in the middle of the channel, the yield stress distribution is non-uniform. As a result, a Venturi-like contraction is formed solely by material means, i.e. without changing the flow path geometry. This may lead to a new category of controlled semi-active valves. However, a fundamental research is still required to characterize the rheology of MR fluids in this mode. In the study the authors explore opportunities for building a pinch mode valve assembly for the experimental work with MR fluids. The authors propose a solenoid assembly that can be integrated into a flow bench, and then proceed with a CFD steady-state study of the fluid flow through the valve. The results are then presented in the form of velocity plots and pressure maps as well as averaged pressure drop vs volumetric flow rate, respectively, at various levels of ampere turns.

show abstract

Section: Cfd Modelmentioning

confidence: 99%

“…apparent viscosity model is not capable of the flow field at high yield stress levels and low flow velocities (or at low Reynolds numbers and high Hedstrom numbers [12]). To handle the discontinuity the authors followed the procedure highlighted in [12]. The approach, however, is not without drawbacks.…”

Section: Cfd Modelmentioning

confidence: 99%

Pinch Mode Magnetorheological Flow Bench: Fluid Flow Analysis

Goldasz,

Sapinski,

Kubik

et al. 2023

10th ECCOMAS Thematic Conference on Smart Structures and Materials

View full text Add to dashboard Cite

show abstract

“…eir main disadvantage is the necessity of using various simplifying assumptions, e.g., uniform yield stress/flux, fully developed flow, etc. On the contrary, continuum multiphysics (magnetics and flow dynamics) models utilize fewer assumptions and can be exercised on realistic geometries, however, at a significant computational expense [29].…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Model of an MR Damper including Magnetic Hysteresis

Kubík

Gołdasz²

2019

Shock and Vibration

View full text Add to dashboard Cite

Hysteresis is one of key factors influencing the output of magnetorheological (MR) actuators. The actuators reveal two primary sources of hysteresis. The hydro(mechanical) hysteresis can be related to flow dynamics mechanisms and is frequency- or rate-dependent. For comparison, the magnetic hysteresis is an inherent property of ferromagnetic materials forming the magnetic circuit of the actuators. The need for a good quality hysteresis model has been early recognized in studies on MR actuators; however, few studies have provided models which could be used in the design stage. In the paper we reveal a hybrid multiphysics model of a flow-mode MR actuator which could be used for that purpose. The model relies on the information which can be extracted primarily from material datasheets and engineering drawings. We reveal key details of the model and then verify it against measured data. Finally, we employ it in a parameter sensitivity study to examine the influence of magnetic hysteresis and other relevant factors on the output of the actuator.

show abstract

“…Electrorheological fluid (ERF) or magnetorheological suspension (MRS) technology has been researched broadly in mechanical and vehicle engineering, including studies by Moosheimer and Waller (2000), Chen and Wei (2007), Chen and Bullough (2007), Ellam (2004), Choi et al (2002), Choi et al (2007), Hong et al (2005), Choi et al (2001), Hong et al (2008) and many other researchers. However, the research on rotary dampers based on ERF (or MRS) has focused on disc or cylinder rotary dampers, which have doubleplane acting surfaces (Chen and Bullough, 2010;Chen and Wei, 2006;Hong et al, 2005;Nie et al, 2009). In order to get higher total output torque, recently, Shi Wei and Li Yang (Li and Huang, 2005;Shi and Chen, 2007) presented a new prototype of the damper in which a corrugated rotary disc replaces one of the plate discs.…”

Section: Introductionmentioning

confidence: 99%

Study of corrugated disc rotary damper based on intelligent effect

Chen

Shi

2012

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

An experimental rotary damper device with a corrugated disc and a plate disc (called corrugated damper) has been examined. The narrow gap between the two discs is filled with an electrorheological fluid (or magnetorheological suspension); therefore, the electrostructural effect has to be taken into consideration. Computational fluid dynamics (FLUENT software) is used to produce comparative performance data between corrugated rotary damper and ordinary dual-plate rotary damper. Theoretical and numerical studies have shown that the total output torque increment for the corrugated disc rotary damper is significantly larger than that of the dual-disc rotary damper when the impact of the electric field strength is ignored. The results help the optimal design of a pre-prototyping structure with an electrorheological (or magnetorheological suspension) fluid damper.

show abstract

CFD Study of the Flow in a Radial Electrorheological Fluid Clutch

Cited by 6 publications

References 7 publications

Pinch Mode Magnetorheological Flow Bench: Fluid Flow Analysis

Pinch Mode Magnetorheological Flow Bench: Fluid Flow Analysis

Multiphysics Model of an MR Damper including Magnetic Hysteresis

Study of corrugated disc rotary damper based on intelligent effect

Contact Info

Product

Resources

About