CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

BOLTZMANN SOLUTION OF COUPLED NONLINEAR EQUATIONS FOR MOISTURE CONTENT w(s) AND TEMPERATURE T(s), s=x/root(4t). BENCHMARK TEST I, CEN (2002).

Johan Claesson (Institutionen för bygg- och miljöteknik, Byggnadsteknologi)
Göteborg : Chalmers University of Technology, 2012. - 43 s.
[Rapport]

There are many models for coupled moisture and heat flow in porous building materials. A question is how accurate the various models are. There is a need to compare the models with a solution with high and well documented accuracy. The model with its Mathcad files presented here tries to meet that need. It was originally presented in Dresden 2002 at a CEN meeting. The solution is now used in a provisional European standard: • European Provisional Standard prEN 15026, Hygrothermal Performance of Building Components and Building Elements – Assessment of Moisture Transfer by Numerical Simulation, 2005. The presented model may be summarized in the following way: • Highly non-linear coupled moisture and heat flow • Highly unbalanced time scales between moisture content w and temperature T • Any functional relations for flow coefficients and state functions are easily implemented • Directly verified accuracy from with errors in the equations below 0.03 %. • Implemented in Mathcad.

Nyckelord: Coupled heat and moisture flow. Solution to test numerical models.



Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2012-12-19. Senast ändrad 2012-12-19.
CPL Pubid: 168214

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Byggnadsteknologi (2005-2017)

Ämnesområden

Building Futures
Byggnadsteknik

Chalmers infrastruktur

Ingår i serie

Report - Department of Civil and Environmental Engineering, Chalmers University of Technology