text:     singlePhaseTransportModel laminarTransport(U, phi);
  
      // Thermal expansion coefficient [1/K]
      dimensionedScalar beta(laminarTransport.lookup("beta"));
  
      // Reference temperature [K]
      dimensionedScalar TRef(laminarTransport.lookup("TRef"));
  
      // Laminar Prandtl number
      dimensionedScalar Pr(laminarTransport.lookup("Pr"));
  
      // Turbulent Prandtl number
      dimensionedScalar Prt(laminarTransport.lookup("Prt"));
  