Dept. of Mechanical Engineering

Modeling of droplet motion on textured surfaces

Naji, Mayssam (Bilkent University, 2021-09)

We describe the motion of a droplet on a textured ratchet track using a non-linear resonator model. A textured ratchet track is composed of semi-circular pillar array that induces a net surface tension gradient on a droplet ...

Learning based control compensation for multi-axis gimbal systems using inverse and forward dynamics

Leblebicioğlu, Damla (Bilkent University, 2021-09)

Unmanned aerospace vehicles (such as rockets, drones, and satellites) usually carry sensors as their primary payload. These sensors (i.e., electro-optical and/or infrared imaging cameras) are used for image processing, ...

Particle sensing with narrowband microwave split-ring resonators

Küçükoğlu, Berk (Bilkent University, 2021-09)

A new microwave sensor with concentric split-ring resonator (CSRR) topology is designed and integrated with microﬂuidics. While the resonator is being driven at its resonant frequency, cells passing through the channel ...

Design, fabrication, and locomotion analysis of an untethered, miniature, legged, compressible, soft robot: CSQUAD

Kalın, Mert Ali İhsan (Bilkent University, 2021-09)

Conventional robotics has been eﬀective for industrial applications such as fast, precise and accurate production or for sophisticatedly controlled systems for the last couple of centuries. However, as the robots become ...

Geometry optimization with variationally consistent forces using higher-order finite element methods in Kohn-Sham density functional theory calculations

Karaca, Kaan (Bilkent University, 2021-09)

Variationally consistent atomic forces are computed for Kohn-Sham density func-tional theory (DFT) solved via a higher order ﬁnite element (FEM) framework. Force expressions are derived for pseudopotential and all-electron ...

Nanomechanical buckling for applications in nonlinear dynamics

Demiralp, Berke (Bilkent University, 2021-07)

There has not been enough attention on post buckling behavior at nano scale even though it reveals rich nonlinear and chaotic dynamics and has potential to be used on cutting edge sensing, actuation, computation and ...

Predicting human behavior using static and dynamic models

Albaba, Berat Mert (Bilkent University, 2021-08)

Modeling human behavior is a challenging problem and it is necessary for the safe integration of autonomous systems into daily life. This thesis focuses on modeling human behavior through static and dynamic models. The ...

DC-electrokinetic motion of colloidal cylinder(s) in the vicinity of a wall

Atay, Atakan (Bilkent University, 2021-07)

DC-electrokinetic behavior of colloidal particles in the vicinity of a conducting/non-conducting planar boundary is investigated using an inhouse boundary element method (BEM) based solver in MATLAB R􀀁 environment. In ...

Sensing and characterization of single nanoparticles by vacuum-free nanoelectromechanical systems with an integrated polymeric lens

Erdoğan, Ramazan Tufan (Bilkent University, 2021-08)

Machines in the nanoscale dimension had the opportunity to become a top-notch choice to detect and characterize nanoparticles thanks to the rapid progress in micro-nano fabrication. Sensors that can detect and identify ...

A multi-domain direct boundary element formulation for particulate flow in microchannels

Topuz, Alper (Bilkent University, 2021-08)

In the present study, a multi-domain boundary element formulation is developed for high surface-area-to-volume ratio problems (i.e. particulate ﬂow in high as-pect ratio microﬂuidic channels, in a porous medium or in ...

Shared control in aerial cyber-physical human systems

Eraslan, Emre (Bilkent University, 2021-06)

This study considers the problem of control when two distinct decision makers, a human operator and an advanced automation working together, face severe uncer-tainties and anomalies. Under the rubric of Cyber-Physical Human ...

Design, manufacturing, and rough terrain analysis of a collision resilient foldable, adjustable wheeled miniature robot: FAWSCY

Demir, Didem Fatma (Bilkent University, 2021-01)

FAWSCY: Foldable Adjustable Wheeled Stringy Clumsy Robot is a foldable, collision resilient, adjustable wheeled robot which can run through diﬀerent ter-rains and inclined surfaces, to inspect areas which are unavailable ...

Viscoelastic effects in lubricated contacts in the presence of cavitation

Gamaniel, Samuel Shari (Bilkent University, 2020-11)

A model is proposed to study the influence of fluid viscoelasticity on the performance of lubricated contacts in the presence of cavitation. Previous studies on viscoelastic lubricants did not consider the presence of ...

A spectral vanishing viscosity method for large-eddy simulations of two-fluid flow

Khoshavaz, Solmaz (Bilkent University, 2020-12)

DNS studies of turbulent flows have proved to be inefficient in terms of time and computational resources. On the other hand, Large-eddy simulation (LES) is an effective approach towards modeling turbulence. The current ...

Theoretical and experimental analysis of a soft and miniature quadruped

Taşkıran, Tamer (Bilkent University, 2020-11)

Multi-body dynamic modeling of non-rigid and legged robots is an active research area with the goal of investigating the interaction of a robot with its environment and its resulting locomotion. The results of such studies ...

Bow tie shaped coplanar waveguide microwave resonators for single cell detection, flow rate measurements, and nanopore sensing of viruses

Seçme, Arda (Bilkent University, 2020-09)

Measurement sensitivity of different biosensing applications can be enhanced by using the microwave resonators. In the first application, microwave sensors based on bow tie shaped coplanar waveguide (CPW) resonator was ...