TY JOUR TI LEAKAGE THROUGH FACE SEAL TAKING INTO ACCOUNT CORRUGATION AND ROUGHNESS KW impermeability KW face seal KW leakage KW filtration KW porosity KW contact interaction KW fractal dimension JO Bulletin of Bryansk state technical university AU Tikhomirov , V.. AU Izmerov, M.A. PY 2016 IS 2016 PB Bryansk State Technical University