I have read many answers on stack exchange about what is the physical meaning of enthalpy, and there are some wonderful explanations.

one analogy i find very satisfying is it is the energy we need to create space for our system in our environment

but heating a gas a constant volume increases its internal energy ,but why enthalpy is increasing in that case ?

∆H=∆U+V∆p

By this formula we can see that enthalpy is increasing,but there is no pv work happening