Michelle Spanjaards

Michelle Spanjaards
Eindhoven University of Technology | TUE · Department of Mechanical Engineering

PhD

About

15
Publications
2,337
Reads
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96
Citations
Education
July 2017 - January 2022
Eindhoven University of Technology
Field of study
  • Computational Rheology
September 2014 - June 2017
Eindhoven University of Technology
Field of study
  • Mechanical Engineering - Polymer Technology
September 2011 - August 2014
Eindhoven University of Technology
Field of study
  • Mechanical Engineering

Publications

Publications (15)
Article
Full-text available
Due to promising results, the patient cohort for transcather aortic valve replacement (TAVR) has been extended in recent years to include patients with a bicuspid aortic valve (BAV). There are different types of BAV. One variant is the tricommisural bicuspid aortic valve (TBAV). BAV have an increased risk of post-TAVR complications such as paravalv...
Article
Full-text available
In silico simulations can be used to evaluate and optimize the safety, quality, efficacy and applicability of medical devices. Furthermore, in silico modeling is a powerful tool in therapy planning to optimally tailor treatment for each patient. For this purpose, a workflow to perform fast preoperative risk assessment of paravalvular leakage (PVL)...
Article
Full-text available
Fiber-reinforced polymer composites are largely employed for their improved strength with respect to unfilled matrices. Considering semi-crystalline materials under relevant processing conditions, the applied pressure and flow induce shear stresses at the fiber–polymer interface. These stresses may strongly enhance the nucleation ability of the fib...
Article
External gear pumps are used in fluid transport systems because of their tight clearances and accurate flow control. These tight clearances are a challenge for numerical studies in terms of spatial discretization. In earlier work, the flow of a viscous fluid in an external gear pump is computed using the finite element method (FEM). An element size...
Article
Full-text available
Profile extrusion is a production technique to make polymer profiles and hollow tubes. At a certain distance after the die exit the polymer extrudate is guided into a cooling chamber, where the polymer is cooled extensively to set the part dimensions. Uniform cooling in the cooling chamber is required to avoid warpage and twisting of the extrudate...
Article
Full-text available
The extrusion of highly filled elastomers is widely used in the automotive industry. In this paper, we numerically study the effect of thixotropy on 2D planar extrudate swell for constant and fluctuating flow rates, as well as the effect of thixotropy on the swell behavior of a 3D rectangular extrudate for a constant flowrate. To this end, we used...
Article
Full-text available
In this paper, an experimental strategy is presented to characterize the rheological behavior of filled, uncured rubber compounds. Oscillatory shear experiments on a regular plate-plate rheometer are combined with a phenomenological thixotropy model to obtain model parameters that can be used to describe the steady shear behavior. We compare rate-...
Article
Full-text available
In this paper we study the numerical stability of four positive (semi-)definite formulations for viscoelastic fluid flows: the LCR formulation of Fattal and Kupferman (2004), the Cholesky-log formulation of Vaithianathan and Collins (2003), the b-symmetric formulation of Balci et al. (2011) and the CDT formulation of Carrozza et al. (2019). The num...
Article
Full-text available
In this paper we propose a novel approach to solve the inverse problem of three-dimensional die design for extrudate swell, using a real-time active control scheme. To this end, we envisioned a feedback connection between the corner-line finite element method, used to predict the positions of the free surfaces of the extrudate, and the controller....
Article
Full-text available
A 3D transient non-isothermal finite element code is developed to predict the extrudate shape of viscoelastic fluids emerging from an asymmetric keyhole shaped die. The corner-line method is used to model the movement of the free surfaces. The code is tested using two benchmark problems. First the corner-line method is tested using a trumpet shaped...
Article
Full-text available
A new transient 3D finite element method for predicting extrudate swell of domains containing sharp edges is proposed. Here, the sharp edge is maintained over a large distance in the extrudate by describing the corner lines as material lines. The positions of these lines can be used to describe the transverse swelling of the 2D free surfaces and ex...
Article
Full-text available
In this work, a systematic investigation of the migration of sedimenting particles in a viscoelastic Couette flow is presented, using finite element 3D simulations. To this end, a novel computational approach is presented, which allows us to simulate a periodic configuration of rigid spherical particles accurately and efficiently. To study the diff...
Poster
Full-text available
3D extrudate shape prediction for complex extrusion flows
Poster
Full-text available
Transient 3D FE method for predicting extrudate swell for domains containing sharp edges

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