@inproceedings {tacbad-spp-2015, title = {Lateral motion of a spherical particle suspended in Couette flow}, booktitle = {Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress}, year = {2015}, month = {3{\textendash}6 Jun 2015}, pages = {SPP-2015-5C-04}, address = {University of Northern Philippines, Vigan City}, abstract = {
This study aims to simulate the lateral motion of a neutrally buoyant spherical particle suspended in Couette flow using a lattice-Boltzmann algorithm. It was found that the particle migrates to an equilibrium position at the center of the channel regardless of its initial position. A force coupling constant controls the strength of particle and fluid interactions. Requiring this constant to enforce Stokes{\textquoteright} drag on the particle resulted in a slightly faster migration than when using a constant that conserves the net kinetic energy.
}, author = {Robert C Tacbad and Zed Harold E. Fernandez and Francis N. C. Paraan} } @inproceedings {tacbad-spp-2014, title = {Lateral motion of a suspended spherical particle between two parallel moving walls}, booktitle = {Proceedings of the 32nd Samahang Pisika ng Pilipinas Physics Congress}, year = {2014}, month = {17{\textendash}20 Oct 2014}, pages = {SPP2014-PB-4}, address = {University of the Philippines Diliman, Quezon City}, abstract = {
This study aims to determine the dynamics of a spherical particle that is suspended in a fluid that is confined between two parallel moving walls. A simulation was done using the molecular dynamics software LAMMPS. It was observed that the particle tends to move toward the wall nearer to it and that its equilibrium displacement is approximately proportional to its initial distance from the center. It was also observed that increasing the wall velocity increases the magnitude of this lateral displacement.
}, author = {Robert C Tacbad and Joshua Gregor A Dizon and Francis N. C. Paraan} } @inproceedings {tacbad-spp-2013, title = {Parallel speed-up and efficiency in single loop sums and matrix multiplication}, booktitle = {Proceedings of the 31st Samahang Pisika ng Pilipinas Physics Congress}, year = {2013}, month = {23{\textendash}25 Oct 2013}, pages = {SPP2013-PB-09}, address = {University of San Carlos, Cebu City}, abstract = {
This study aims to evaluate the performance of parallel implementations of single loop sums and matrix multiplication using the Message Passing Interface. Benchmark results were obtained from the available computing resources of the Structure and Dynamics Group (SanD). These implementations were run using 1 to 24 processors and their speed-up and efficiency were calculated. Nearly ideal speed up and efficiency was observed when tasks were distributed over physical cores of a single CPU.
}, author = {Robert C Tacbad and Francis N. C. Paraan} }