Browse Theoretical and Applied Mechanics (TAM) Published Papers by Title

  • Hill, Kimberly M.; Gioia, Gustavo; Amaravadi, Deepak R. (American Physical Society, 2004-11)
    We model the radial segregation patterns that form in a thin rotating drum partially filled with beads of two sizes. We predict that the waviness (or amplitude-to-wavelength ratio, denoted w) of a pattern should be subjected ...
    untranslated PDF (300KB)
  • Berfield, Thomas A.; Ong, Ryan J.; Payne, David A.; Sottos, Nancy R. (American Institute of Physics, 2007)
    Piezoelectric properties of three sol-gel derived Pb(Zr0.53Ti0.47)O3 thin film specimens of different thicknesses integrated onto Pt/Ti/SiO2||Si substrates are investigated to delineate the influence of residual stress on ...
    untranslated PDF (356KB)
  • Bagchi, Prosenjit; Balachandar, S. (Cambridge University Press, 2004)
    The interaction of an isolated spherical particle with an isotropic turbulent flow is considered using direct numerical simulations (DNS). The particle Reynolds number is varied from about 50 to 600 and the particle ...
    untranslated PDF (2MB)
  • Natrajan, Vinay K.; Christensen, Kenneth T. (American Institute of Physics, 2006)
    The present effort documents the relationship between dominant subgrid-scale energy transfer events and coherent motions within the log layer of wall turbulence.
    untranslated PDF (2MB)
  • Pushkin, Dmitri O.; Aref, Hassan (American Institute of Physics, 2002)
    A theory of stationary particle size distributions in coagulating systems with particle injection at small sizes is constructed. The size distributions have the form of power laws. Under rather general assumptions, the ...
    untranslated PDF (458KB)
  • Tomkins, Christopher D.; Adrian, Ronald J. (Cambridge University Press, 2003)
    Spanwise structure and growth mechanisms in a turbulent boundary layer are investigated experimentally. PIV measurements are obtained in the streamwise– spanwise (x–z)-plane from the buffer layer to the top of the ...
    untranslated PDF (1MB)
  • Natrajan, Vinay K.; Wu, Yanhua; Christensen, Kenneth T. (Cambridge University Press, 2007)
    The spatial signatures of retrograde spanwise vortices in wall turbulence are assessed from particle-image velocimetry measurements in the streamwise–wall-normal plane of a zero-pressure-gradient turbulent boundary layer ...
    untranslated PDF (747KB)
  • Kasimov, Aslan R.; Stewart, D. Scott (Cambridge University Press, 2002)
    We investigate hydrodynamic instability of a steady planar detonation wave propagating in a circular tube to three-dimensional linear perturbations, using the normal mode approach. Spinning instability is identified and ...
    untranslated PDF (554KB)
  • Hill, Kimberly M.; Gioia, Gustavo; Tota, Vinay V. (American Physical Society, 2003)
    We show that the structure of a dense, free-surface boundary layer granular flow is similar to the structure of a laminar liquid flow: There is a strong component of order (stratification parallel to the mean flow) ...
    untranslated PDF (470KB)
  • Stewart, D. Scott; Kasimov, Aslan R. (Society of Industrial and Applied Mathematics, 2005)
    A steady planar self-sustained detonation has a sonic surface in the reaction zone that resides behind the lead shock. In this work we address the problem of generalizing sonic conditions for a three-dimensional unsteady ...
    untranslated PDF (230KB)
  • Gioia, Gustavo; Chakraborty, Pinaki (American Physical Society, 2006)
    The classical experiments on turbulent friction in rough pipes were performed by Nikuradse in the 1930s. Seventy years later, they continue to defy theory. Here we model Nikuradse’s experiments using the phenomenological ...
    untranslated PDF (315KB)
  • Gioia, Gustavo; Cuitiño, Alberto M.; Zheng, S.; Uribe, T. (American Physical Society, 2002)
    When poured into a container, cohesive granular materials form low-density, open granular aggregates. If pressure is applied to these aggregates, they densify by particle rearrangement. Here we introduce experimental and ...
    untranslated PDF (3MB)
  • Zeng, Lanying; Balachandar, S.; Fischer, Paul (Cambridge University Press, 2005)
    We perform direct numerical simulations of a rigid sphere translating parallel to a flat wall in an otherwise quiescent ambient fluid. A spectral element method is employed to perform the simulations with high accuracy. ...
    untranslated PDF (2MB)