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Sensitivity Analysis Of Frost Deposition In Turbulent Flow Over A Cold Plate Using Direct Numerical Simulation, N. Farzaneh, Nadim Zgheib, S. A. Sherif, S. Balachandar
Sensitivity Analysis Of Frost Deposition In Turbulent Flow Over A Cold Plate Using Direct Numerical Simulation, N. Farzaneh, Nadim Zgheib, S. A. Sherif, S. Balachandar
Mechanical Engineering Faculty Publications and Presentations
We use a recently-developed, turbulence-informed physics-based model to study frost buildup over a flat plate subjected to turbulent flow. The plate temperature is held fixed but varied across simulations in the range −10◦C ≤ T∗ p ≤ −5◦C. Similarly, the free-stream temperature and humidity ratio are also held fixed but varied across simulations in the range 0◦C ≤ T∗∞ ≤ 20◦C and 3.77 × 10−3 ≤ ew∞ ≤ 1.47×10−2, respectively. We find the Nusselt and Sherwood numbers, when scaled by the frost surface to free stream temperature and humidity ratio difference, respectively, to become independent of free-stream temperature and humidity …
A Physics-Based Model For Frost Buildup Under Turbulent Flow Using Direct Numerical Simulations, Nadim Zgheib, N. Farzaneh, S. Balachandar, S. A. Sherif
A Physics-Based Model For Frost Buildup Under Turbulent Flow Using Direct Numerical Simulations, Nadim Zgheib, N. Farzaneh, S. Balachandar, S. A. Sherif
Mechanical Engineering Faculty Publications and Presentations
We present a new model for frost buildup under turbulent (and laminar) flow using direct numerical simulations. The physical model consists of two layers, the air and the frost. The air layer is fully resolved and consists of solving for the velocity, temperature, and vapor mass fraction fields. The frost layer thickness is resolved using conservation of mass and energy. Both phases are dynamically coupled using the immersed boundary method. Three-dimensional simulations are conducted in an open-channel configuration. A number of challenges need to be overcome to make these simulations feasible. First, to enforce far-field conditions of zero …