Are results from CFD analysis enough to write and publish a paper?
Possibly Yes

If you are using an already validated CFD code, then any unique or interesting results that you find would be candidate material for an article.

If you are writing your own CFD code, then you must validate/verify it before you publish your code's results.

[In code validation,]


  The overall objective is to demonstrate the accuracy of CFD codes so
  that they may be used with confidence for aerodynamic simulation and
  that the results be considered credible for decision making in design.
  ...
  Credibility is obtained by
  demonstrating acceptable levels of uncertainty and error. A discussion
  of the uncertainties and errors in CFD simulations is provided on the
  page entitled Uncertainty and Error in CFD Simulations. The levels of
  uncertainties and errors are determined through verification
  assessment and validation assessment.


There are several methods of validation but the two widely accepted methods are:


Simulate a configuration that you can test, then test that
configuration.  If your code's results matches the test results, that's
generally considered a good validation.
Simulate a configuration that you can model with an already
validated CFD code.  If their results agree, that's also considered
a good validation.


Of course you still need to perform a grid sizing analysis and other tests to ensure/prove you're using your code correctly.