Wall friction effects and viscosity reduction of gel propellants in conical extrusion

Rahimi, Shai; Durban, David; Khosid, Savely

doi:10.1016/j.jnnfm.2010.04.003

Cited by 19 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In view of the author previous works, [55][56][57][58] the objective of this paper is to investigate the influence of wall friction and nonuniform viscosity on the Newtonian and non-Newtonian fluids properties (velocity, mean viscosity, stresses) in convergent wedge steady flow field while wall deformability has been disregarded. A parametric investigation has been conducted to evaluate the effects of the wedge geometry, rheological parameters, wall friction factor, inertia effect and inlet/outlet pressure conditions (hydrodynamic pressure distribution and axial pressure distributions).…”

Section: Introductionmentioning

confidence: 99%

A parametric investigation of blood flow in a wedge with non‐uniform viscosity and wall friction

Nagler

2019

Z Angew Math Mech

View full text Add to dashboard Cite

The radial planar wedge pattern flow with friction and normalized non-uniform viscosity function will be discussed here. Solving this problem will be done using the flow theory equations for Newtonian and Non-Newtonian cases with non-uniform viscosity assumption. General differential equation that connects between the normalized velocity profile and the normalized viscosity has been derived analytically from the flow equations. It was found that for specific wedge semi angle, the radial assumption is no longer valid for the flow velocity. Moreover, it was found that for inlet/outlet conditions the normalized mean hydrostatic pressure for Newtonian fluid is dependent on the geometry, the normalized velocity and the viscosity functions. In addition, it was found that inertia phenomenon can be neglected for small wedge semi angle. A comparison between the axial and the hydrostatic pressure distributions for inlet/outlet conditions was performed for Newtonian and non-Newtonian flows. Finally, it was found that the axial pressure distribution profile was converged to the hydrostatic profile for critical wedge semi angle. K E Y W O R D Sblood flow, hydrostatic pressure difference, non-linear viscosity, non-Newtonian fluid, viscosity, wedge

show abstract

Section: Introductionmentioning

confidence: 99%

A parametric investigation of blood flow in a wedge with non‐uniform viscosity and wall friction

Nagler

2019

Z Angew Math Mech

View full text Add to dashboard Cite

show abstract

“…Extrusion flows through a slit die are studied for two materials (Rahimia, S., Durbanb, D. and Khosid, 2010): a linear low density polyethylene (LLDPE) which exhibits sharkskin instability for flow rates larger than an onset value and a low density polyethylene (LDPE) which does not show any instability over a broad range of flow rates. By combining laser-Doppler velocimetry (LDV) with rheological measurements in both uniaxial extension and shear, the distributions of tensile and shear stresses in extrusion flows are measured for both materials.…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Theoritical Study on the Pressure Drop of Fluid at Extrusion Process

Dalmiş¹,

Güler²,

Karakoca³

et al. 2015

EJOVOC Electronic Journal of Vocational Colleges

View full text Add to dashboard Cite

This paper investigated the pressure drop during the extrusion processes. The objectives of this investigation were to increase efficiency of plastic extrusion which plastic equipment produced. In the experimental processes, two rectangular dies were used. HD 7255 thermoplastic was used as the fluid material of extrusion. A difference occurred between inlet and outlet. This difference was 2.34 MPa in terms of the pressure drop and was 0.001216 (kg s -1 ) in terms of the flow rate. The results of power law model is found in good agreement with experimental results for outlet sections of process.

show abstract

Experimental Study on Spray Characteristics of ADN/Water Based Gel Propellant with Impinging Jet Injectors

Wang¹,

Zhang²,

Guan

et al. 2020

Propellants Explo Pyrotec

View full text Add to dashboard Cite

ADN/water‐based gel propellant is a new high‐energy, green, non‐toxic propellant, so it has good application prospects in the future aerospace industry. In order to study the spray characteristics of ADN/water‐based gel propellant, two‐strand impinging nozzles were used to carry out experiments. The spray images were observed by high‐speed photography, and the effects of different injection pressure, nozzle diameter, and impact angle on spray configuration, spray cone angle and breakup length of liquid film were studied. The results show that the breakup length of liquid film decreased with the increase in injection pressure and impact angle, and increased with the increase in nozzle diameter. The spray cone angle increased with the increase in injection pressure, nozzle diameter, and impact angle. And the effects of spray pressure and nozzle diameter on spray process were obvious. The distribution of propellant spray in space was clarified under these conditions and it would provide reference data for the structural design of the combustion chamber of the engine.

show abstract

Wall friction effects and viscosity reduction of gel propellants in conical extrusion

Cited by 19 publications

References 34 publications

A parametric investigation of blood flow in a wedge with non‐uniform viscosity and wall friction

A parametric investigation of blood flow in a wedge with non‐uniform viscosity and wall friction

An Experimental and Theoritical Study on the Pressure Drop of Fluid at Extrusion Process

Experimental Study on Spray Characteristics of ADN/Water Based Gel Propellant with Impinging Jet Injectors

Contact Info

Product

Resources

About