  The emittance growth in the HL-LHC due to beam-beam effects is examined by
virtue of strong-strong computer simulations. A model of the transverse damper
and the noise level have been tuned to simulate the emittance growth in the
present LHC. Simulations with projected HL-LHC beam parameters and crab
cavities are discussed. It is shown that with the nominal working point, the
large beam-beam tune shift moves the beam into a resonance that causes
substantial emittance growth. Increasing the working point slightly is
demonstrated to be very beneficial.
