  The excess temperature of the solar corona over the photosphere poses a
challenge. Multiple energetic events contribute to maintaining the corona at
such high temperatures. The energy released in different events can vary across
several orders of magnitude. Large energy events of geomagnetic importance like
flares and coronal mass ejections (CMEs) contribute little to the global
energetics of the solar corona. Therefore, events with several (9-10) orders of
magnitudes of lower energy, with much higher frequency of occurrence, need to
be studied in great detail. Observations suggest that these impulsive events
with different energies follow a power-law distribution, indicating a common
underlying mechanism. We perform observation-motivated modeling of coronal
loops (magnetic flux tubes) to understand the energetics of these small
transient events and their similarity with impulsive events like flares. This
thesis uses the EBTEL code based on the 0D hydrodynamical description of
coronal loops. This approach is appropriate for getting quick estimates of the
energetics of the system over a wide range of parameters. We then discuss the
improvement of EBTEL to make it suitable over a broader range of parameters.
This is followed by using improved EBTEL to explore the possibility of
simulating impulsive events of different energy generated using a single
power-law distribution. Comparison between observed emissions from various
components of multi-thermal plasma and hydrodynamical models suggest the
heating to be impulsive. Since field-aligned flows induced due to impulsive
events are a crucial part of our modeling of coronal loops, we discuss the
implications of such flows in the context of transition region heating.
