58 citations · 240 across the 15 of their papers we have counts for
17 papers
Vortex topology in the lee of a 6:1 prolate spheroid
Marc Plasseraud, Krishnan Mahesh
A large scale parametric study of the flow over the prolate spheroid is presented to understand the effect of Reynolds number and angle of attack on the separation, the wake format…
Monolithic framework to simulate fluid-structure interaction problems using geometric volume-of-fluid method
Soham Prajapati, Ali Fakhreddine, Krishnan Mahesh
We develop a three-dimensional Eulerian framework to simulate fluid-structure interaction (FSI) problems on a fixed Cartesian grid using the geometric volume-of-fluid (VOF) method.…
Definition of vortex boundary using stagnation pressure
Marc Plasseraud, Krishnan Mahesh
A novel method is proposed to identify vortex boundary and center of rotation based on tubular surfaces of constant stagnation pressure and minimum of the stagnation pressure gradi…
Boundary layer transition due to distributed roughness: Effect of roughness spacing
Rong Ma, Krishnan Mahesh
The influence of roughness spacing on boundary layer transition over distributed roughness elements is studied using direct numerical simulation (DNS) and global stability analysis…
A variational volume-of-fluid approach for front propagation
Ali Fakhreddine, Karim Alamé, Krishnan Mahesh
A variational volume-of-fluid (VVOF) methodology is devised for evolving interfaces under curvature-dependent speed. The interface is reconstructed geometrically using the analytic…
Arnoldi-based orthonormal and hierarchical divergence-free polynomial basis and its applications
Sreevatsa Anantharamu, Krishnan Mahesh
This paper presents a methodology to construct a divergence-free polynomial basis of an arbitrary degree in a simplex (triangles in 2D and tetrahedra in 3D) of arbitrary dimension.…
Global stability analysis and direct numerical simulation of boundary layers with an isolated roughness element
Rong Ma, Krishnan Mahesh
Global stability analysis and direct numerical simulation (DNS) are performed to study boundary layer flows with an isolated roughness element. Wall-attached cuboids with aspect ra…
A method to determine wall shear stress from mean profiles in turbulent boundary layers
Praveen Kumar, Krishnan Mahesh
The direct measurement of wall shear stress in turbulent boundary layers (TBL) is challenging, therefore requiring it to be indirectly determined from mean profile measurements. Mo…
Response of a plate in turbulent channel flow: Analysis of fluid-solid coupling
Sreevatsa Anantharamu, Krishnan Mahesh
The paper performs simulation of a rectangular plate excited by turbulent channel flow at friction Reynolds numbers of 180 and 400. The fluid-structure interaction is assumed to be…
Numerical study of cavitation regimes in flow over a circular cylinder
Filipe L. Brandao, Mrugank Bhatt, Krishnan Mahesh
Cavitating flow over a circular cylinder is investigated over a range of cavitation numbers for both laminar and turbulent regimes. We observe non-cavitating, cyclic and transition…
Analysis of wall-pressure fluctuation sources from DNS of turbulent channel flow
Sreevatsa Anantharamu, Krishnan Mahesh
The sources of wall-pressure fluctuations in turbulent channel flow are studied using a novel framework. The wall-pressure power spectral density (PSD) is expressed a…
A variational level set methodology without reinitialization for the prediction of equilibrium interfaces over arbitrary solid surfaces
Karim Alamé, Sreevatsa Anantharamu, Krishnan Mahesh
A robust numerical methodology to predict equilibrium interfaces over arbitrary solid surfaces is developed. The kernel of the proposed method is the distance regularized level set…
Direct numerical simulation of turbulent channel flow over random rough surfaces
R. Ma, K. Alamé, K. Mahesh
Direct numerical simulation (DNS) of flow in a turbulent channel with a random rough wall is performed at and . The roughness geometry corresponds to the experiment…
Multiphase unsteady Stokes flow over grooved surfaces: an analytical study
Yixuan Li, Karim Alame, Krishnan Mahesh
This paper studies multiphase flow within grooved textures exposed to external unsteadiness. We derive analytical expressions for multiphase unsteady Stokes flow driven by oscillat…
A parallel and streaming Dynamic Mode Decomposition algorithm with finite precision error analysis for large data
Sreevatsa Anantharamu, Krishnan Mahesh
A novel technique based on the Full Orthogonalization Arnoldi (FOA) is proposed to perform Dynamic Mode Decomposition (DMD) for a sequence of snapshots. A modification to FOA is pr…
Wall-bounded flow over a realistically rough superhydrophobic surface
Karim Alamé, Krishnan Mahesh
Direct numerical simulations (DNS) are performed for two wall-bounded flow configurations: laminar Couette flow at and turbulent channel flow at , where is t…
Analysis of axisymmetric boundary layers
Praveen Kumar, Krishnan Mahesh
Axisymmetric boundary layers are studied using integral analysis of the governing equations for axial flow over a circular cylinder. The analysis includes the effect of pressure gr…