Chemical engineering 2 Chemical reactors 2 Heat transfer 2 Heat transfer coefficients 2 Heat transfer parameters 2 Liquid distribution 2 Particle diameter 2 Particle radii 2 Radial liquid distribution 2 Radial temperature profiles 2 Reynolds number 2 Thermal conductivity 2 Trickle bed reactors 2 Two zones model 2 Wall effect 2 conference paper 2 distribution 2 heat transfer 2 liquid 2 liquid flow 2 mathematical analysis 2 mathematical parameters 2 measurement 2 model 2 particle size 2 reactor 2 temperature 2 thermal conductivity 2 trickle bed reactor 2