This article explains how padmasana posture is the best for meditation and how it enhances the energy in the aspirant.
The kundalini energy can only be experienced for those who have awakened it in an ordinary manner.
Kundalini meditation deals not only with the human mind but also include other aspects as mentioned in ancient yoga texts.
Manipura chakra is the third level chakra and situated in the navel area. This chakra is also located in the sushumna nadi.