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Adjoint-based optimization of displacement ventilation flow
- Publication Year :
- 2017
- Publisher :
- Elsevier, 2017.
-
Abstract
- We demonstrate the use of the ‘Direct-Adjoint-Looping method’ for the identification of optimal buoyancy-driven ventilation flows governed by Boussinesq equations. We use the incompressible Reynolds-averaged Navier-Stokes (RANS) equations, derive the corresponding adjoint equations and solve the resulting sensitivity equations with respect to inlet conditions. We focus on a displacement ventilation scenario with a steady plume due to a line source. Subject to an enthalpy flux constraint on the incoming flow, we identify boundary conditions leading to ‘optimal’ temperature distributions in the occupied zone. Our results show that depending on the scaled volume and momentum flux of the inlet flow, qualitatively different flow regimes may be obtained. The numerical optimal results agree with analytically obtained optimal inlet conditions available from classical plume theory in an ‘intermediate’ regime of strong stratification and two-layer flow.
- Subjects :
- Environmental Engineering
020209 energy
Geography, Planning and Development
Displacement ventilation
02 engineering and technology
01 natural sciences
Line source
010305 fluids & plasmas
Physics::Fluid Dynamics
Control theory
0103 physical sciences
0202 electrical engineering, electronic engineering, information engineering
Boundary value problem
forced convection
Civil and Structural Engineering
Mathematics
geography
geography.geographical_feature_category
numerical PDE-constrained optimization
Building and Construction
Mechanics
Inlet
Direct-Adjoint-Looping method
Plume
intermediate regime
Flow (mathematics)
Compressibility
line plume
Reynolds-averaged Navier–Stokes equations
displacement ventilation
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....99ae2106e2efee89621a9d7553aa707b
- Full Text :
- https://doi.org/10.17863/cam.13423