Anand Vyas, Ph.D.
Instructor
- Milwaukee WI UNITED STATES
- Allen Bradley Hall of Science: S261A
- Mechanical Engineering
Dr. Anand Vyas is interested in thermofluid applications involving modeling and theoretical analysis.
Education, Licensure and Certification
Ph.D.
Mechanical Engineering
Marquette University
2003
M.S.
Mechanical Engineering
SUNY, University of Buffalo
1999
B.S.
Mechanical Engineering
Government Engineering College
1995
Biography
Areas of Expertise
Accomplishments
Phi Theta Kappa Golden Apple Award for recognition as an outstanding faculty member. Nominated by PTK student(s)
2015
Outstanding Faculty of the Year Award. Nominated and voted by faculty at IHCC
2015
NASA/Wisconsin Space Grant Consortium Graduate Fellowship, UW-Green Bay
2002
Thomas Jefferson Fellowship, University of Tennessee Space Institute
1999
Affiliations
- American Society of Mechanical Engineers (ASME) : Member
- American Institute of Aeronautics and Astronautics (AIAA) : Senior Member
- American Society for Engineering Education (ASEE) : Member
Social
Research Interests
Aerospace Engineering
Modeling, Theoretical Analysis and Control related to Thermofluids Phenomena in Aerospace Engineering
Mechanical Engineering
Modeling, Theoretical Analysis and Control related to Thermofluids Phenomena in Mechanical Engineering
Selected Publications
Analytical and numerical solutions for torsional flow between coaxial discs with heat transfer
SIAM Journal of Applied MathematicsOlagunju, D., Vyas, A. B. and Zhang, S
2008
We consider non-isothermal torsional ∞ow between two coaxial parallel plates with heat transfer at the upper rotating plate, constant temperature on the lower stationary plate, and no heat loss at the ∞uid-air interface. Viscous heating is modelled by a Nahme law with exponential dependence on temperature. Due to the highly nonlinear nature of the governing equations an exact solution is not feasible. Therefore we solve the problem using both numerical and perturbations methods. Speciflcally, analytical solutions are obtained using asymptotic expansions based on the aspect ratio and the Nahme-Gri-th number, a measure of viscous heating, as perturbation parameters. The numerical solutions are obtained by a flnite element method. Good agreement is found between the analytical and numerical solutions in appropriate parameter range. In viscometric applications the torque exerted by the ∞uid on the lower plate is an important quantity. For isothermal ∞ow the dimensionless torque can be easily calculated. In this paper we obtain an analytical formula that can be used to calculate non-isothermal correction to the torque.
Higher Mean-Flow Approximation for a Solid Rocket Motor with Radially Regressing Walls
SIAM Journal of Applied MathematicsMajdalani, J., Vyas, A.B., Flandro, G.A.
2009
In a recent study leading to an exact solution of the Navier-Stokes equations, a mistake in calculating a simple constant propagates into several equations. The error first appears in Eq. (29) of the subject paper, where the coefficient of the third derivative at order must be a "4" instead of a "3". To confirm this correction, we consider the case for which the porous walls are not regressing
Asymptotic Temperature Distribution in a Simulated Combustion Chamber
Journal of Heat TransferVyas, A.B., Majdalani, J.
2006
In an axisymmetric model of a solid rocket motor, a cylindrical combustion chamber with porous walls is considered. For a posited range of operating parameters, the energy equation is perturbed and linearized using the dimensionless Péclet number. The possibility of circumventing chemical reactions while retaining the essential physics of the problem is explored. This is accomplished by artificially introducing a distributed heat source above the propellant surface. The resulting energy equation is then solved to zeroth order. The analytical solution and corresponding temperature maps are verified qualitatively using comparisons with numerical simulations of the combustion chamber.
Estimation of the Laminar Premixed Flame Temperature and Velocity in Injection Driven Combustion Chambers
Combustion and FlameVyas, A.B., Majdalani, J., Yang, V.
2003
Several laminar flame theories have been proposed in the past, the objective of each being the determination of fundamental flame attributes. Classification of these theories has been based on the degree of realism associated with their attendant assumptions, and these are carefully described by Kuo and others. Our approach proceeds along the lines of Mallard and Le Chatelier, yet differs in some aspects. Whereas Mallard and Le Chatelier divide the flame region into a preheat and a reaction zone, our premixed flame will be treated in a single zone. Furthermore, the chemical reaction rates will be either prescribed or simulated before being introduced into the analytical model as a spatially distributed heat source.
Higher Mean-flow Approximation for a Solid Rocket Motor With Radially Regressing Wall
AIAA JournalMajdalani, J., Vyas, A.B., Flandro, G.A.
2002
