46 citations · 104 across the 6 of their papers we have counts for
6 papers
Non-Gaussianity and Secondary Gravitational Waves from Primordial Black Holes Production in -attractor Inflation
Kazem Rezazadeh, Zeinab Teimoori, Saeid Karimi +1
We study the non-Gaussianity and secondary Gravitational Waves (GWs) in the process of the Primordial Black Holes (PBHs) production from inflation. In our work, we focus on the …
Numerical time integration of lumped parameter systems governed by implicit constitutive relations
Saeid Karimi
Time-integration for lumped parameter systems obeying implicit Bingham-Kelvin constitutive models is studied. The governing system of equations describing the lumped parameter syst…
A hybrid multi-time-step framework for pore-scale and continuum-scale modeling of solute transport in porous media
S. Karimi, K. B. Nakshatrala
In this paper, we propose a computational framework,which is based on a domain decomposition technique, to employ both finite element method (which is a popular continuum modeling…
Do current lattice Boltzmann methods for diffusion and diffusion-type equations respect maximum principles and the non-negative constraint?
S. Karimi, K. B. Nakshatrala
The lattice Boltzmann method (LBM) has established itself as a valid numerical method in computational fluid dynamics. Recently, multiple-relaxation-time LBM has been proposed to s…
A monolithic multi-time-step computational framework for first-order transient systems with disparate scales
S. Karimi, K. B. Nakshatrala
Developing robust simulation tools for problems involving multiple mathematical scales has been a subject of great interest in computational mathematics and engineering. A desirabl…
On multi-time-step monolithic coupling algorithms for elastodynamics
S. Karimi, K. B. Nakshatrala
We present a way of constructing multi-time-step monolithic coupling methods for elastodynamics. The governing equations for constrained multiple subdomains are written in dual Sch…