closure parameter

closure parameter

[′klō·zhər pə‚ram·əd·ər]
(astronomy)
The ratio of the actual mean mass density of the observable universe to the critical density for a Friedmann universe.
References in periodicals archive ?
ij] are the positive and negative parts of the stress tensor and obtained by decomposition of the stress tensor based on its principal values and principal directions, D is damage parameter and h is a microdefects closure parameter which is a material-dependent parameter and used to make different between compressive and tensional behaviours of material.