Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed

Suicidality in somatization and undifferentiated somatoform disorders: A hospital-based study

Aim: The aim of this study is to examine suicidality in patients with somatization and undifferentiated somatoform disorders. Materials and Methods: Suicidality was assessed among 105 consecutive patients diagnosed with somatization disorder or undifferentiated somatoform disorder according to the ICD-10 criteria. The Mini-International Neuropsychiatric Interview-Plus and the Columbia-Suicide Severity Rating Scale were used in the study. Results: In the study sample, 68.6% reported wish to be dead, 37.1% reported of nonspecific active suicidal thoughts, and 1.9% reported active suicidal ideation with specific plan and intent. The most frequent reason for suicidal ideation was to end or stop the pain. Conclusion: This study had revealed that somatization and undifferentiated somatoform disorders have a high risk of self-harm