You can use the following torque commands in your batch script to release your jobs on your desired node.
#PBS -l nodes=1:ppn=1:chem01
#PBS -q chem01
For I/O-intensive-calculations and their temporary results you should use the /tmp directory on the local hard disk. The data have to be written back on the parallel file system after termination of the job.
#PBS -l nodes=1:ppn=1:comp_phys
#PBS -q cpt
#PBS -l nodes=1:ppn=1:geotest
#PBS -q geotest
#PBS -l nodes=1:ppn=1:hpc-uni
#PBS -q hpc-uni